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Mighty Mule

Model # FM500-STP

Internet # 100431553

Heavy Duty Single Swing Automatic Gate Opener Access Package

This item has been discontinued.
The Home Depot no longer carries this specific product.

$599.00 /each

  • Affordable remote-controlled automatic gate opener system
  • Designed for the "Do-It-Yourself" installer
  • Made for single swing gates up to 18 ft. or 850 lbs.




Model # FM500-STP

Internet # 100431553

The Heavy-Duty Single Swing Automatic Gate Opener Access Package (FM500) is Mighty Mule strongest single gate operator. Offering two additional single button remotes and a wired or wireless digital keypad, the gate opener is designed for single swing gates up to 18 ft. or weighing up to 850 lbs. This package is ideal for ornamental, vinyl, tubular steel farm gates, chain link or wood gates.

  • Includes 3 single button access remotes (FM135), wired or wireless digital keypad (FM137), AC transformer (RB570), battery (FM150), control box, all required hardware and a detailed installation manual with interactive DVD
  • Ideal for single swing gates up to 18 ft. or a maximum of 850 lbs.
  • Perfect for all gate types including ornamental, vinyl, tubular steel farm gates, chain link or wood gates
  • 30% Residential energy efficient property tax credit available, residential home owners can use this credit on a new operator system, accessories and installation with the purchase of a Mighty Mule solar panel; 10-Watt (FM123)
  • Mighty Mule offers strong, elegant steel gates on that can be shipped directly to your home
  • Backed by a 18-month Mighty Mule warranty and technical support

  • Home Depot protection plan available

    Home Depot Protection Plan

Info & Guides

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Maximum gate size (ft.) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Commercial/Residential Use 
Fencing Product Type 
Gate Opener Kit 
Gate opening style 
Hardware Included 
Lighting Included 
Power Requirements 
AC or Solar 
Product Weight (lb.) 
36 lb 
Remote control included 
Weight Capacity (lb.) 
Wired or Wireless 
Warranty / Certifications
Manufacturer Warranty 
Limited 18 month on gate openers, Limited 12 month on accessories 


Rated 4.4 out of 5 by 15 reviewers.
Rated 3.0 out of 5.0 by so so after I got it tweeked Iron Gate about 10 foot long. The motor on this is slow and not to strong . Had a wheel on the bottom of gate and motor would stop at every bump. Had to cut and move brakes on gate higher and remove wheel. Tweeting the angle of the brakes was a little challenging. Battery dose run out quick. Gate still opens too far and was not able to fix that. Finally got it to close all the way to post. Over all it works for now. One note the brakes that holds motor to the gate not the one that holds the motor to post. That brake did bend and is way to this. If all variables are good then I would recommend product. If not don't bother. March 24, 2015
Rated 1.0 out of 5.0 by NO Contractor will install I purchased two of these units on sale, Upon contacting a local fence company to install some fencing and new gates they informed me they would not touch the Mighty Mule. Then another and finally a third fence company. They say they get NO support from the manufacturer. I fear I am stuck with some junk, too late to return probably. May try and install with help of an electrician and some friends myself?? Not off to a good start thought... October 8, 2014
Rated 5.0 out of 5.0 by works great Works great. Plenty of support when needed. Youtube has a lot movie to help install it. It has some good items to work with. May 19, 2015
Rated 5.0 out of 5.0 by Makes my life easier!! We had a manual sliding gate and installing this Mighty Mule has made my life so much easier!! It was fairly simple to install but is pretty sensitive to any drag on the gate. We have a 16.5' gate and had to reinforce the gate post so it would hold the gate up without sagging. (Could be the fault of the fence installer!) We have installed the solar panel as well and so far the charge is perfectly adequate for our needs. Closing time needs to be quicker and we are having bit of difficulty with that....dogs will get out if gate is open too long. Overall I LOVE this thing! September 24, 2013
Rated 4.0 out of 5.0 by all works well...... took me about 2 days to make adjustments like hanging the gate, etc. So far all works well. Only problem so far is that on rare occasions, it does not close automatically according to the time programmed. December 17, 2014
Rated 5.0 out of 5.0 by Personally proven reliable product! This makes the third Mighty Mule gate opener I have purchased. The first two are still going strong after many years of service. I am sure this opener will do the same. Thanks to Home Depot for providing it at a very competitive price! April 15, 2015
Rated 4.0 out of 5.0 by Best choice for operator I already have a FM350 and bought the FM500 on sale for a second gate. Definitely prefer the FM500 for easier installation and seems to be an overall better operator. April 14, 2015
Rated 5.0 out of 5.0 by Great for animal lovers!!! This product is perfect for those of us with animals. The automatic gate opener gives us more security and we don't have to get out of the vehicle to open and close the gate. We recently closed in our front yard with a fence and gate on the front side. We already had the other 3 sides closed in with fence for our horses. Now our dogs can roam in our yard and we don't have to worry about them getting into the road. This product is the perfect solution!!! September 19, 2010
  • 2015-10-11T10:27:00.222-05:00
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