The AmSafe Seat Belt length hole to hole is 61" and the holes are 9/16" in diameter.
The maximum useful Seat Belt length is about 74-1/2" long from mounting hole center to mounting hole center. The mounting holes are 9/16".
The Female Belt side is 32-3/8" from the center of the mounting hole to the end of the Female latching mechanism.
The Seat Belt comes with mounting hardware consisting of QTY (2) of the following: 7/16-20 x 2" long Grade 5 Hex Head bolts, 7/16-20 nylon insert lock nuts, 2.5" diameter flat fender washers and QTY (4) 1-1/4" diameter flat washers.
The Kit also comes with instructions in English, Spanish, and French.