BulletProof Hitches Extreme Duty Pintle Coupler Lock

The BulletProof Hitches Extreme Duty Pintle Coupler Lock is a heavy-duty theft-deterrent designed for pintle-hitch trailers. Its patented clamping design fits all lunette ring sizes, so one lock covers the full range of pintle couplers without adapters or sizing guesswork. The lock ships with two matching keys and a heavy-duty rubber cap.

Patented Fit Across All Lunette Ring Sizes

Because pintle couplers vary in lunette ring diameter across trailer makes and classes, a lock that fits only one size leaves owners carrying multiple locks or accepting a loose fit. The BulletProof Extreme Duty Pintle Coupler Lock's patented design clamps securely regardless of ring size, so it works on light utility trailers and heavy equipment trailers alike without modification.

Built to Stay Functional in the Field

Each lock is treated with an aircraft-grade lubricant before it ships, which keeps the mechanism operating smoothly after extended outdoor exposure. The heavy-duty rubber cap protects the keyway from dirt, moisture, and debris when the lock is in place, reducing the maintenance that typically shortens the service life of trailer security hardware left outdoors between hauls.

Features

• Patented universal fit: works with all pintle trailer couplers and lunette ring sizes
• Two matching keys included: both keys ship with the lock
• Aircraft-grade lubricant treatment: applied at the factory for long-term mechanism reliability
• Heavy-duty rubber cap: shields the keyway from dirt, moisture, and debris

Who This Is For and Isn't

The BulletProof Extreme Duty Pintle Coupler Lock suits anyone who regularly leaves a pintle-hitch trailer unattended: at a job site, trailhead, storage yard, or overnight on the road. The universal lunette ring fit makes it practical for operators who run more than one trailer type.

This lock is designed for pintle-hitch couplers only and is not compatible with ball-mount couplers or gooseneck hitches. It secures the coupler against unauthorized hitching; it is not a wheel lock, kingpin lock, or cable lock.

Common Questions

Will this lock fit my specific lunette ring size?

The BulletProof Extreme Duty Pintle Coupler Lock uses a patented design that accommodates all lunette ring sizes used on pintle-hitch trailers, so no sizing selection is required at purchase.

How many keys come with the lock?

The BulletProof Extreme Duty Pintle Coupler Lock ships with two matching keys included in the box.

Does the lock require any maintenance to stay functional outdoors?

The lock is factory-treated with an aircraft-grade lubricant and includes a heavy-duty rubber cap over the keyway, both of which reduce the maintenance needed to keep the mechanism operating after outdoor exposure.

Is there a California Proposition 65 warning for this product?

Yes. California residents should be aware that this product contains chemicals known to the State of California to cause cancer, birth anomalies, or other reproductive harm.