--- product_id: 4006826 title: "Automatic Gate Lock" brand: "mighty mule" price: "NZ$1050" currency: NZD in_stock: true reviews_count: 13 url: https://cook.desertcart.com/products/4006826-automatic-gate-lock store_origin: CK region: Cook Islands --- # 2500 lbs force resistance Universal compatibility DIY easy installation Automatic Gate Lock **Brand:** mighty mule **Price:** NZ$1050 **Availability:** ✅ In Stock ## Summary > 🔐 Lock in security, unlock your peace of mind. ## Quick Answers - **What is this?** Automatic Gate Lock by mighty mule - **How much does it cost?** NZ$1050 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [cook.desertcart.com](https://cook.desertcart.com/products/4006826-automatic-gate-lock) ## Best For - mighty mule enthusiasts ## Why This Product - Trusted mighty mule brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Automatic Locking:** Locks and unlocks instantly as your gate operates—no extra steps needed. - • **Trusted Reliability:** Backed by a 12-month warranty and expert technical support for peace of mind. - • **Effortless DIY Setup:** Designed for quick, hassle-free installation with your Mighty Mule gate opener. - • **Unbreakable Security:** Withstands up to 2500 lbs of force to keep your property truly secure. - • **Seamless Compatibility:** Works flawlessly with all single and dual Mighty Mule & GTO/Pro gate openers. ## Overview The Mighty Mule Automatic Gate Lock (FM143) is a heavy-duty, black alloy steel lock engineered to automatically secure single or dual gates paired with Mighty Mule or GTO/Pro automatic gate openers. It delivers robust protection against forced entry withstanding up to 2500 lbs of force, features easy DIY installation, and is supported by a 12-month warranty and technical assistance, making it the go-to upgrade for millennial professionals seeking reliable, smart home security solutions. ## Description Product Description Elevate the security of your property with the Mighty Mule Automatic Gate Lock (FM143). Designed for use with Mighty Mule Automatic Gate Openers, this heavy-duty electric gate lock provides a reliable and robust solution to keep unwanted guests out, ensuring your peace of mind. Whether you have a single or dual gate installed with a Mighty Mule automatic gate opener kit, this Automatic Gate Lock automatically secures your gate, offering unwavering stability and top-tier security for your home, farm, or ranch. Transform a variety of gate types, including ornamental, chain link, tube, vinyl, and wood gates, with the Mighty Mule Automatic Gate Lock. Its user-friendly DIY installation process, paired with an easy-to-follow guide, allows for effortless setup. This Mighty Mule Automatic Gate Lock seamlessly pairs with both single swing and dual swing gate openers from Mighty Mule and GTO, enhancing your gate control system with ease. The Mighty Mule Gate Opener Lock is just one of the many Mighty Mule accessories designed to optimize the functionality and security of your gate opener system. Rest assured with the included 12-month Mighty Mule Warranty and access to full technical support for any questions or assistance you may need. Please note that mounting hardware is not included with the Mighty Mule Automatic Gate Lock. Elevate your property's security with this reliable and convenient gate lock solution from Mighty Mule. From the Manufacturer The Automatic Gate Lock provides maximum stability and security on Mighty Mule Gate systems, recommended for gates over 8 ft. long, high wind areas or additional reinforcement to prevent against unwanted intrusion. Review: Keeps the honest people out! - Someone decided they needed to be on my property despite the gate, fence, barbed wire, and two retarded dogs. After I came home and saw my gate bent open I decided this was no longer too expensive to get. This has two wires that you have to figure out how to get to the black box. Once you open up the black box you can stab around pretty blindly and still hook this up pretty easily. I am a complete goober and managed to make it work! Believe it or not, it makes a notable difference in the (false) sense of security you have with a gate. It makes a person have to WANT to come on to your property instead of just pushing the gate until it yields. It will NOT yield with this in place. Your gate will physically break before this gives out. It is very solid BUT dependent greatly on your method of connecting it to your gate. I did not use their hardware. Instead, I used two "U" bolts that lined up perfectly with the holes and then "fixed" the nuts so they would not easily come off. All in all, I am very happy with this lock. It works great. Review: Very satisfied - I read all the bad reviews for customer service on this company, but their product is very much more affordable than all the rest, so I took a chance. I, too, had to read the instructions carefully, because my MM 600 is not listed in the lock's compatible openers. But I saw that the diagrams showed photos very similar to my control board, and took a shot. Everything fell into place, and the lock works great. One caveat: the receiver pin that the lock grabs on the post, did not fit between my gate and post. I don't like that big of a gap anyway. I used a 4" wide square Ubolt as the receiver pin, by drilling holes in the post, and setting it into the post at the right angle to be grabbed by the lock. It works fine as long as you carefully line them up before welding the ubolt in place (yes I have a pipe post, but you could do the same with wood posts by drilling tight holes, and wedging the ubolt in place. Use a hammer to drive the bolt into place with smaller diameter holes. You can still adjust it by pulling it out and in of the post.) I had a four inch wide by five inch length SQUARE ubolt. These are hard to come by in my area, and I ordered it off the net. (desertcart, OF COURSE). http://www.desertcart.com/gp/product/B000BQM05Q/ref=cm_cr_ryp_prd_ttl_sol_1 So I managed to bypass customer service at MM for now. I'm a very limited handyman and even I did this, so you can too. ## Features - The Automatic Gate Lock provides peace of mind and added security for your single or dual gate. Unlocks and locks automatically as the gate is activated. - Provides secure protection to withstand up to 2500 lbs. of force, providing stability and security. - Easy DIY (Do It Yourself) installation for your Mighty Mule Automatic Gate Opener system. - The Mighty Mule Automatic Gate Lock is compatible with all single and dual Mighty Mule or GTO/Pro Automatic Gate Swing Openers. - Backed by a 12 month Mighty Mule Warranty and Technical Support. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0009SS13Q | | Brand | Mighty Mule | | Brand Name | Mighty Mule | | Color | Black | | Customer Reviews | 4.5 out of 5 stars 1,310 Reviews | | Exterior Finish | Black | | Global Trade Identification Number | 00090835071009 | | Included Components | Lock with 10' of low voltage wire, Lock Receiver, Clevis Pin, Locking Cap, Lock Board Battery Lead Wires, White Wire, Lock Control Board, 2 Double Spade Tongue terminals, 6 Nylon Cable Ties, Wire Connector, Lock Keys, Lock Decal, Instruction Manual | | Installation Type | Screw-In | | Item Dimensions L x W x H | 12.25"L x 7.25"W x 2.5"H | | Item Type Name | Automatic Gate Lock | | Item Weight | 2.7 kg | | Manufacturer | Mighty Mule | | Manufacturer Part Number | FM143 | | Manufacturer Warranty Description | Limited 12 Month Manufacturers Warranty (from date of purchase) | | Material | Alloy Steel | | Material Type | Alloy Steel | | Model Number | FM143 | | Number of Items | 1 | | Product Dimensions | 12.25"L x 7.25"W x 2.5"H | | Recommended Uses For Product | gates over 8' long, animal enclosures, high wind areas, use with fm700 & fm702 openers | | Size | Pack of 1 | | UPC | 728639275315 735090851132 090835071009 | | Unit Count | 1 Count | ## Product Details - **Brand:** Mighty Mule - **Color:** Black - **Exterior Finish:** Black - **Material:** Alloy Steel - **Product Dimensions:** 12.25"L x 7.25"W x 2.5"H ## Images ![Automatic Gate Lock - Image 1](https://m.media-amazon.com/images/I/81pJXxnWvXL.jpg) ![Automatic Gate Lock - Image 2](https://m.media-amazon.com/images/I/71PCrR0yBhL.jpg) ![Automatic Gate Lock - Image 3](https://m.media-amazon.com/images/I/81RpbWcCraL.jpg) ![Automatic Gate Lock - Image 4](https://m.media-amazon.com/images/I/61+GSyZnftL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: Does this lock work with the Mighty Mule FM-200 Gate Opener?** A: Yes it does. Simply hook it up to the lock+ and lock- on the control board. Disregard the additional circuit boards that are included. **Q: Will I have to have a positive stop installed on my slave gate to make the gate lock work on my dual gates?i can take most of the play out of the gate** A: Yes **Q: Can this be used with smart devices?** A: This lock is activated through the circuit board of the primary gate opener arm. If you have a gate opener that can be used with smart devices, this lock can be also. **Q: Will this lock work with FM350 gate opener?** A: The answer is Yes and No, please let me explain. Yes it will work with the FM350 but if you have a lightweight gate it may be impossible for it to latch regularly. This lock requires approximately 10lbs. of force to latch. There are other gate locks that better handle the slow speed and relative low force of the FM350. Try the Estate Swing automatic gate lock, available on Amazon, it requires only 1/2Lb. of force to latch and is great for both low mass gates and slower speed gates. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Keeps the honest people out! *by R***R on January 15, 2015* Someone decided they needed to be on my property despite the gate, fence, barbed wire, and two retarded dogs. After I came home and saw my gate bent open I decided this was no longer too expensive to get. This has two wires that you have to figure out how to get to the black box. Once you open up the black box you can stab around pretty blindly and still hook this up pretty easily. I am a complete goober and managed to make it work! Believe it or not, it makes a notable difference in the (false) sense of security you have with a gate. It makes a person have to WANT to come on to your property instead of just pushing the gate until it yields. It will NOT yield with this in place. Your gate will physically break before this gives out. It is very solid BUT dependent greatly on your method of connecting it to your gate. I did not use their hardware. Instead, I used two "U" bolts that lined up perfectly with the holes and then "fixed" the nuts so they would not easily come off. All in all, I am very happy with this lock. It works great. ### ⭐⭐⭐⭐⭐ Very satisfied *by L***S on May 17, 2013* I read all the bad reviews for customer service on this company, but their product is very much more affordable than all the rest, so I took a chance. I, too, had to read the instructions carefully, because my MM 600 is not listed in the lock's compatible openers. But I saw that the diagrams showed photos very similar to my control board, and took a shot. Everything fell into place, and the lock works great. One caveat: the receiver pin that the lock grabs on the post, did not fit between my gate and post. I don't like that big of a gap anyway. I used a 4" wide square Ubolt as the receiver pin, by drilling holes in the post, and setting it into the post at the right angle to be grabbed by the lock. It works fine as long as you carefully line them up before welding the ubolt in place (yes I have a pipe post, but you could do the same with wood posts by drilling tight holes, and wedging the ubolt in place. Use a hammer to drive the bolt into place with smaller diameter holes. You can still adjust it by pulling it out and in of the post.) I had a four inch wide by five inch length SQUARE ubolt. These are hard to come by in my area, and I ordered it off the net. (AMAZON, OF COURSE). http://www.amazon.com/gp/product/B000BQM05Q/ref=cm_cr_ryp_prd_ttl_sol_1 So I managed to bypass customer service at MM for now. I'm a very limited handyman and even I did this, so you can too. ### ⭐⭐⭐⭐⭐ Replacement lock *by R***I on October 26, 2024* A direct lightning strike took out our original 6 year old gate lock. It worked flawlessly, so we purchased another one. So far, so good. Easy installation, I think a little pricey, but when you consider my family’s safety and the security of our farm’s entrance, I guess it is worth it. If you have a Mighty Mule automatic gate opener, you need an automatic gate lock. ## Frequently Bought Together - Automatic Gate Lock (FM143) for Mighty Mule Automatic Gate Openers , Black - Mighty Mule Wireless Digital Keypad (FM137), Black, 25 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://cook.desertcart.com/products/4006826-automatic-gate-lock](https://cook.desertcart.com/products/4006826-automatic-gate-lock) --- *Product available on Desertcart Cook Islands* *Store origin: CK* *Last updated: 2026-08-23*