The Trimax Coupler Lock is designed to prevent theft and keep your boat trailer secure while it is connected to your vehicle. It easily locks and unlocks with a 1/4 turn， yet it will not pop open or lock when you don't want it to. The lock is made of stainless steel and features a solid forged construction that you can rely on. It will not pull out， and it won't bend or break. The patented design of this tubular key lock incorporates an O-ring and a watertight cap to prevent dirt and corrosion from damaging the head mechanism， which increases longevity. It is available in two different span options: 2-1/2" and 3-1/2".

Trimax Coupler Lock