This is the Zeagle BCD Crotch Stap Assembly Features include: The 519-CS02 Crotch Strap can be used on all Zeagle Backplates Also fits on any Zeagle BC (Ranger, Tech, etc.) that has a 2 slot at the bottom of the vest section back 2" ring to attach to a towing fixture of a DPV (Diver Propulsion Vehicle) The 2" ring features a quick release buckle Available in 1" or 2" options Afford to dive!!! "