Features 1. Superior Fitment: Each bit features a precisions-machined tip for ideal fit in screw head recesses, resulting in less stripped screws. 2. High Grade Steel: Made from shock-resistant and heat treated steel for professional performances and maximum durability. 3. Highly Compatible with Tool: Universal 1 or 4"hex shanks with unique power groove fits most powered corded or cordless drill. 4. It is very useful for home maintenance, very suitable for car maintenance, machinery and other maintenance work. 5. Package include 20 pieces Screwdriver Bits, and one 75MM Extension. Specification Material: Carbon steel Color: Silver Size: 75 mm Weight: 150 g Package Include: 20 x Screwdriver Bit 1 x 75MM Extension Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.