Proven Industries HL1 Hitch Pin Lock for 2" & 2-1/2" Receivers, Black — 5/8" Stainless Locking Pin, Weather-Resistant

The Proven Industries HL1 Hitch Pin Lock is a heavy-duty, stainless-steel locking pin designed to secure 2" and 2-1/2" trailer receivers with a weather-resistant cap and tamper-resistant key.

Protecting trailers, cargo carriers, and hitch-mounted accessories starts with a reliable locking solution. The HL1 combines a 5/8" stainless pin, a unique pick-resistant keyway, and a sealed rubber cap to keep grit and moisture out. It’s made and tested in the USA to deliver consistent security and durability for towing rigs, work trailers, and recreational vehicles.

How does the HL1 prevent trailer theft?

The HL1 deters unauthorized removal by replacing a standard hitch pin with a lock that requires a specially cut key. Its stainless-steel pin resists cutting and bending, and the lock cylinder is engineered to frustrate common picking techniques. Storing the two included keys separately reduces the chance of lost access.

• 5/8" stainless-steel locking pin for strength against shear forces
• Unique key profile that resists picking and simple duplication
• Comes with two keys for owner redundancy
• Watertight rubber cap shields the pin and mechanism from road grime

Will this lock fit my hitch and how easy is it to swap between sizes?

The HL1 is built to fit both common receiver sizes—2" and 2-1/2"—without additional adapters. The pin diameter is 5/8", the standard for heavy-duty hitch locking, so installation is a one-handed push-and-lock process for most users. Swapping between receivers is simply removing and re-inserting the pin in the alternate receiver.

• Works with 2" and 2-1/2" standard trailer receivers
• 5/8" pin diameter matches industry-standard fittings
• Quick installation and removal using the supplied keys
• Portable and light enough to keep in a glove box or toolbox

How does the HL1 hold up to weather and road conditions?

The lock uses stainless steel to resist corrosion and a rubber sealing cap to block water, salt, and mud from the pin and keyway. Those features reduce the chance of binding or seizing after exposure to winter road spray or coastal humidity. Periodic lubrication of the keyway will prolong smooth operation in harsh environments.

• Stainless-steel construction resists rust and corrosion
• Watertight rubber cap protects against moisture and debris
• Designed for regular highway, off-road, and worksite exposure
• Simple maintenance: rinse, dry, and apply graphite or PTFE lock lubricant as needed

What makes the HL1 different from ordinary hitch pins?

Unlike plain hitch pins, the HL1 replaces the removable metal clip with a true lock cylinder and a precision key. The uniquely profiled key reduces the risk of unauthorized duplication, and the overall build emphasizes corrosion resistance and tamper deterrence. Proven Industries controls design and manufacturing to ensure consistent quality.

• Lock cylinder provides keyed security versus a removable cotter pin
• Unique key design reduces common duplication risks
• Manufactured and quality-checked in the USA
• Compact, portable solution for multiple towing setups

Who is this for: The HL1 Hitch Pin Lock is for trailer owners, landscapers, contractors, and outdoor enthusiasts who need a robust, easy-to-use locking solution for 2" and 2-1/2" receivers. It’s a practical choice for anyone who frequently leaves trailers, hitch-mounted cargo carriers, or bike racks unattended and wants stronger protection than a standard hitch pin provides.