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Infinite Rule Security 61121-S Trailer Latch Lock for Demco EZ Latch 2in Ball Coupler Cast Model

Manufacturer

Infinite Rule Security

<h3>About Infinite Rule Security</h3><p>Infinite Rule Security was born out of a real-world problem. In 2012, company founder Brad Mateko went looking for a way to secure the off-road hooks on his own vehicle and found that no adequate product existed on the market. <strong>Necessity being the mother of invention</strong>, he set out to engineer a solution himself — and what started as a personal project became an award-winning line of locking pins and security hardware trusted by towing enthusiasts across the country.</p><p><a href="/14683-infinite-rule-security-trailer-hitch-lock-14537">Trailer hitch locks</a> sit at the heart of the Infinite Rule Security catalog. The company's machined stainless-steel locking pins are rigorously third-party tested for superior strength and rated up to 21,000 lbs, making them a serious choice for drivers who tow heavy loads. Every lock is built with multiple anti-theft features, including an innovative internal turn-key locking mechanism that resists picking, cutting, and brute-force attacks.</p><p>One of Infinite Rule Security's most valued selling points is their <strong>keyed-alike system</strong>. Customers who order multiple locks in a single order receive units that all operate on the same key — a huge convenience for anyone managing a truck, ball mount, and trailer coupler simultaneously. Combined with tight-fitting weatherproof rubber caps and O-rings that seal out dirt, water, and debris, these locks are built to perform reliably in all conditions.</p><p>Beyond receiver locks, Infinite Rule Security produces a comprehensive range of <a href="/14683-infinite-rule-security-trailer-hitch-pin-19997">trailer hitch pins</a> available in multiple diameters — including 1/2&quot;, 5/8&quot;, and 3/4&quot; — with application-specific fitment engineered to match popular hitch brands like B&amp;W, GEN-Y, Rhino Hitch, and others. This precision-fit philosophy means a lock that doesn't rattle, doesn't slip, and actually deters theft instead of just giving the appearance of security.</p><p>Infinite Rule Security also extends its protection to off-road accessories with <a href="/14683-infinite-rule-security-shackles-202507">shackle locks</a> and locking pins for D-rings, hooks, and recovery gear. Whether you're securing a recovery shackle on a trail rig or locking down towing hardware on a work truck, the product lineup covers the full spectrum of towing and off-road attachment points.</p><p>As a small, family-owned American business, Infinite Rule Security manufactures, ships, and services every product domestically. The company holds <strong>three design patents</strong> and earned first runner-up honors in the Best New Van/Pickup/Sport Utility Vehicle Product category from the Specialty Equipment Market Association (SEMA). For drivers who take their equipment seriously, Infinite Rule Security represents a level of craftsmanship and accountability that's increasingly rare in the security hardware space.</p><ul><li>100% made in the USA — manufactured, shipped, and serviced domestically</li><li>Third-party tested for strength and anti-theft performance</li><li>Keyed-alike system across multi-lock orders</li><li>Weatherproof rubber caps and O-rings for all-weather reliability</li><li>Application-specific fitment for leading hitch brands</li><li>Three design patents and SEMA award recognition</li></ul>

Part Number

61121-S
05/29/2036 11:01 PM
Sale Price

$64.99

In Stock (10+)

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Usually delivered within 2 days

free shipping

FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Infinite Rule Security 61121-S is a purpose-built trailer latch lock designed specifically for the Demco EZ Latch 2-inch ball coupler — cast model only. This anti-theft security lock prevents unauthorized uncoupling of your trailer, giving you added peace of mind whether you're parked at a job site, campground, or storage facility.

Key Features:

  • Engineered specifically for the cast Demco EZ Latch 2" ball coupler — will not fit stamped model couplers
  • Stainless steel construction for strength and corrosion resistance
  • Made in the USA by Infinite Rule Security
  • Weatherproof design for all-season, outdoor use
  • Locks Keyed Alike compatible across Infinite Rule Security product line
  • Deters theft with a custom fit that resists tampering

Infinite Rule Security products are third-party tested for shear strength, ensuring reliable, real-world protection. The 61121-S installs directly into the latch mechanism of the cast Demco EZ Latch coupler, blocking the latch from being released without the key. Important: This lock is compatible with the cast Demco EZ Latch coupler only — verify your coupler model before purchasing, as it will not work with the stamped version.

No

Easy website

Very good.

Only a low start because I am not a boater, nor know boaters.

Had what I needed

Went well becides they showed up on two different day kinda worried me but other than that great.

All good

Best price , and fast service. I give them a three thumbs up .

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