Impact drills have stronger magnets than other drills, which can easily and quickly hold more screws and hold them in place to prevent the drill from slipping. Built-in high-torque and extended bits help high torque from the impact driver for life Made of high-quality S2 steel, it has high hardness, wear resistance, impact resistance, strong toughness, and is durable for long-term use. Impact driver bit sets are commonly used in mechanical equipment, automobiles, motorcycles, bicycles, furniture, electronic equipment, and more. Compatible with impact screwdrivers, electric screwdrivers, hand screwdrivers, 1/4inch screwdrivers, corded drills, cordless drills, electric screwdrivers, hand screwdrivers, power drills, air drills and more. Contains 6 specifications 1inch(25mm), 2inch(50mm), 2.5inch(65mm) 3inch(70mm), 4inch(90mm), 6inch(150mm) PH2 bits . Colour:black Material:steel Package Contents: 3set x Drill Bits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.