The Zeagle Crotch Strap is available in a 1 (2.5cm) or 2 (5cm) widths. The 1 (2.5cm) crotch strap can be used on all Zeagle metal back-plates (see SKU: ZGLBP) and any Zeagle BC (Ranger, Tech, etc.) that has a 1 (2.5cm) tri-bar at the bottom of the vest section back. It has a 1 (2.5cm) ring to attach to a towing fixture of a DPV (Diver Propulsion Vehicle).The 2 (5cm) crotch strap can also be used on all Zeagle hard-plates and any Zeagle BC (Ranger, Tech, etc.) that has a 2 (5cm) slot at the bottom of the vest section back. It has a 2 (5cm) ring to attach to a towing fixture of a DPV (Diver Propulsion Vehicle). Both the 1 (2.5cm) and 2 (5cm) ring features a quick release buckle. Use of a crotch strap provides better system stability and helps prevent tank ride-up.