The Trimax TC3 Trailer Coupler Lock features a triple-plated chrome finish. Provides additional security for your trailer by securing the coupler latch. The latch on the coupler both allows the ball to be received into the coupler and prevents the ball from being removed. Accordingly, a coupler latch lock prevents the latch from moving into the open position. Features patented 1/4 turn technology that cannot be false locked. Full length pin made of solid forged machined steel that cannot be pulled out. No internal springs to seize up or break. Knurling on lock heads adds style and grip. Stainless steel internal components. Double headed or dog bone style design.•1/4 Pin Diameter•3-1/2 Pin Span•Triple Chrome Plated Finish•Knurled Lock Heads for Grip•Lifetime Warranty 3-1/2 useable pin length Knurled lock heads for extra grip Lifetime warranty for worry-free dependability