The TransPac harness comes standard with a one-inch D-ring to accomodate a one-inch crotch strap. Divers who prefer a two-inch strap will need our Crotch Strap Adaptor to attach their crotch strap to the TransPac. A stainless steel assembly screw fits through the stainless steel grommet on the Crotch Strap Adaptor and the bottom grommet on the TransPac harness. The two-inch crotch strap is then woven through the 304 stainless steel loop on the adaptor and secured as normal. Made in the U.S.A.