Feature:1. [FOR SCREW PROCESSING] 1/2in reversible impact driver set for loosening rusted or screws, often used in home or car repairs.2. [EASY ADJUSTMENT] Adjust to the right to tighten the screw or left to loosen the screw, engraved with the letter L and R for easy identification.3. [EASY INSTALLTION] Insert the bit into the hex bit adapter chuck and hit the end of the impact screwdriver tool with a hammer to install.4. [DURABLE MATERIAL] Using excellent tungsten chrome steel material, which has high hardness, wear resistance and high torsion.5. [WITH 12PCS BITS] Equipped with 12pcs screwdriver bits, with slot, hex and types, can meet more maintenance needs.Specification:Item Type: Impact Driver SetMaterial: Tungsten Chrome SteelHandle Length: Approx. 145mm / 5.7inHandle Interface: Square head 1/2inConversion Head: Square head 1/2in to hex head 8MMBit: Hex connector 8MMSlot Bit: 5MM 6MM 8MM 9MMHex Bit: 4MM 5MM 6MM 8MMCross Bit: PH1 PH2 PH3 PH4 Package List:1 x Impact Driver Handle1 x Impact Driver Adapter12 x Bits1 x Storage Box