SPECIFICATIONS MATERIAL: POLYMER COLOR: BLACK LENGTH: 160 mm / 6.30 IN. FEATURES - TWO TURN KNOBS TO TIGHTEN/LOOSEN TAB LOCKING GRIP ONTO RAIL - PUSH BUTTON CONVERTS VERTICAL GRIP INTO ADJUSTABLE HEIGHT BI-POD - HOLD BI-POD GRIP TOGETHER AND PUSH LEGS UP TO CONVERT BACK INTO VERTICAL GRIP