This D-ring holder (also referred to as a "taco") allows you to attach a D-ring onto a cylinder using the stainless sheathed hose clamp. The holder is held into place by the hose clamp and provides an attachment point on a cylinder when desired. These are often used on sidemount, stage, decompression and bailout cylinders that traditionally have a cylinder strap system in place that includes the sheathed stainless hose clamp. This holder works best with standard gauge D-rings. This is NOT compatible with our Heavy Gauge D-rings.