BODY MATERIAL: CARBON STEEL HRC 38-45, 3 JAWS MATERIAL: 35CRMO HRC 40-45, WEIGHT 368G, ADJUSTABLE: 6MM TO 11MM, HEX DRIVE 24MM SQUARE DRIVE 3/8", FITS 3/8" IMPACT WRENCH OR RATCHETING WRENCH, IMPACT WRENCH CAN BE INSERTED DIRECTLY TO EXTRACTOR