Trimax TR125 Dare to compare! TRIMAX, the leader in Receiver Locking Pins, has spent the last 10 years expanding and improving on the "ORIGINAL." The Patented Dual Lock Lug Design offers over 5,800 lbs. of head pull strength. A 1/4 turn of the rugged tube key locks & unlocks the strongest locking pin on the market. Don"t settle for low quality knockoffs! The TR125 is made of high quality chrome plated machined hardened steel. Provides instant security for your camper, boat or trailer by securing your vehicle receiver hitch. Standard bent pin style with one locking dog bone style head. No internal springs to seize up or break. Knurling on lock head adds style and grip and is machined form 100% solid forged steel. Stainless steel internal components. Width between heads (exposed pin length or gap space) is 2.5". For receivers requiring a longer exposed pin length see the SXT5. A receiver pin is used to secure the receptacle part of a trailer hitch (attached to a vehicle) to inserts such as ball mounts, drawbars, accessory carriers or ornamental receiver plugs. The most common receiver pins are 1/2" and 5/8" in diameter. Class II receiver hitches have 1-1/4" receptacles and use 1/2" pins. Class III, IV and V receiver hitches have 2" receptacles and use 5/8" pins. TRIMAX makes the world"s toughest locks. Through value added engineering design, TRIMAX is committed to product innovation that holds up to the highest quality standards. TRIMAX provides maximum security for marine, trailer and tow, RV, performance truck, power sports and bicycle applications. Tested. Tough. TRIMAX. TRIMAX offers a lifetime warranty on all of their products.