This is a great alternative when your coupler is not welded to the frame of the trailer. The cone shaped nut replaces your existing nuts that secure your coupler on.
The nut and bolt size is 1/2". The threading runs 1.5 inches from the end of the bolt down the shank.
When torqued down the hex head shears off leaving only the cone shaped head. This makes it impossible for someone to place any kind of tool on the head and remove the nuts.
Kits come with two bolts and two breakaway nuts.