Protect your property with a Reese Towpower Professional Trailer Coupler Lock. It s ideal for travelers contractors movers and more. The professional-grade lock can secure almost any cargo in transit from lawn mowing equipment to furniture. Your Reese receiver lock has an o-ring sealed locking head and a ball bearing that does not require shaft diameter reductions which cause weak points. Weak points enable a thief to break the lock shaft more easily and escape with your trailer. In fact this trailer receiver lock is the most theft-resistant towing lock currently available. The locking design is so strong that it s patented. The Class III-IV Reese Towpower Professional Trailer Coupler Lock installs in just minutes so you ll be ready to go quickly. The lock comes complete with two high-security keys.