King Tony 3 4Dr 55mm 12Pt Socket ARG3620 84453 3 8in Drive X Core Pinless Punch Plate 140441 9 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 saving precious battery power and life Thin wall design on square driving side 3 4in drive