3 8in Drive X Core Pinless Universal Joint Impact Extension Set 6in 9in & 12in M110560 No metal pegs or inserts fully press the Power No metal pegs or inserts to damage the workpiece when worn One piece slide action safety staple barrel 84453 3 8in Drive X Core Pinless Universal Joint Impact Extension Set 6in 9in & 12in X Core pinless joint design for increased strength and durability Universal joint extensions can be used with any socket style 30 deg maximum operating flex angle Smooth 360 deg rotation for easier access Ball detent for secure socket retention Chrome molybdenum alloy steel (Cr Mo) for exceptional strength and long lasting durability Black oxide finish to resist corrosion High visibility laser etched markings provide quick size identification Meets or exceeds ASME specifications Includes tray for storage and organization