1、The kit contains 20 replacement screwdriver bits and 1 screwdriver handle, easy to install and replace. 2、The aluminum alloy screwdriver handle has glossy arc edges, and the exterior is sandblasted and anodized to prevent sweat and corrosion. 3、The bit is made of S2 steel, with high hardness, good toughness and high strength, and has passed strict quality inspection. 4、There are a variety of specifications such as cross, slot, pentalobe, etc., size is standard, suitable for different maintenance situations. 5、This set of screwdriver tool is commonly used in the maintenance of electronic products, jewelry, glasses, watches, children's toys, game controllers, etc. Item Type: Screwdriver Bit Material: Chrome, S2 steel, aluminum alloy Model: JM-8170 Screwdriver Bit Specifications: T2/T3/T4/T5/T6/T7/T8 Cross 1.5 / 2.0 / 2.5 / 3.0 Slot 1.5 / 2.0 / 2.5 / 3.0 Y0.8/Y2.5 Pentalobe 0.8/1.2 Motherboard cross 1.5 Screwdriver Bit Size: Approx. 4 x 28mm / 0.2 x 1.1in 1 x Handle 20 x Screwdriver Bits 1 x Storage Box