Surely the length depends on the vehicle you are going to attach it to....... :nut: I know, i know, don't call you Surely
The small ones, landie type etc uses 9/16" bolts, and the mahoosive lorry type ones are 5/8"
Found out the hard way, a large one looks largely the same in a fleabay pic as a small one, but most definatley does not bolt to the front bumper of a Landie..... :nut:
Well, i suppose it could......
That said, I wouldn't use anything less than 8.8 strength bolts (5-strokes imperial)
Alec.