Tough aluminum construction Fits all 5th wheel king pin couplers Integral finger grips allow easy handling Package Weight : 1.278 pounds The DeadBolt / CT Johnson KingPin Lock is an important safeguard for your 5th wheel. This kingpin lock has a heavy-duty, one-piece collar that locks in place with a 5/8" diameter locking pin, offering maximum security for unattended trailers. The heavy-duty collar is made of tough, T6 tempered aluminum for rugged use. The lock has a durable, textured, powder-coated finish and integral finger grips that allow easy handling. The locking pin can also double as a Class III/IV hitch lock. It comes with a weather cap to keep out dirt and moisture. Fits all 5th wheel king pin couplers. Comes with two keys.