[Applicability] With coupler locks for almost all 1-7/8Inch, 2Inch and 2-5/16Inch trailer couplers, Fits for cars and trailers, regular trailers, and mobile trucks, boat trailers, covered utility trailers, bulldog trailers, jet ski trailers, travel trailers, and camping trailers, etc. [ trailer hitch lock] Trailer coupler lock is made of aluminum, which can effectively protect the trailer security. Hardened die-cast zinc lock body is strong, and . The total lock body is painted to prevent rust and and stand up to any weather. [Security and anti-theft] Our trailer locks are constructed with a trailer locking core that controls the coupler and prevents others from pulling out the receiver/coupler, protecting your trailer from being pulled away by other vehicles.The advanced locking mechanism prevents lock picking and door prying. Painting the exterior of the trailer locks in an eye-catching yellow color give thieves an effective deterrent, making your trailer and more secure. [Easy installation without tools] This trailer padlock is simple in design and very easy to install, no need for complicated tools and techniques, just plug in the ball joint and put it in the right position, finally lock it with the key. Tip:Please make sure the part number of the replacement matches the old unit before ordering. Colour:Yellow Material:Aluminum Alloy Package Contents: 1 x Trailer Hitch Lock 2 x Keys Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.