Female buckle non-slip design - Built-in metal spring clip on the back of the female buckle effectively prevents sliding on the belt. Upgraded quick-clip non-slip female buckle - No need to untie the belt, quick-clip design, quick change of waist position, built-in non-slip spring clip on the back clip. Expandable hanging hole - The quick-clip buckle is equipped with 2 expandable hanging holes, which can be used with climbing rings and safety ropes. Universal quick-clip for measuring tape - Can directly replace the metal hanging hole of the measuring tape, and the screws are fixed with the old measuring tape screws.