Specifications:The impact bit is made of chrome vanadium alloy steel, which can withstand greater impact.It is mainly used to loosen stubborn bolts that are rusted or cold welded, and can also be used for final tightening of bolts.Made of high hardness steel material, it is stable and durable.The smooth edge and anti-slip design makes it easy and safe to use. Item Name: Impact Screwdriver SetMaterial: Chrome Vanadium Alloy SteelQuantity: 8Pcs/SetFeatures: Durable, Impact Screwdriver, Anti-slipSize: 20cm x 10.4cm x 4.4cm/7.87" x 4.09" x 1.73" (Approx.) Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes:1 x Screwdriver Handle1 x 8cm x 7cm Slotted Screwdriver Bit1 x 8cm x 7cm Phillips Screwdriver Bit2 x 8cm x 3.5cm Slotted Screwdriver Bits3 x 8cm x 3.5cm Phillips Screwdriver Bits