Specifications: Practical and long service life. Easily switch between bits in seconds. Swivel head flips and locks from drilling to driving. Works with your own power drill. Well packed and assorted in a plastic box for convenient access and storage. Type: Drill Driver Bits Set Quantity: 20Pcs/Set Material: Chrome-vanadium Steel Drill Driver Size: 14.6cm x 1.7cm/5.75 x 0.67 (Approx.) Flathead Bits Length: 5cm/1.97 (Approx.) Notes: 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. Package Includes: 1 Drill Driver 8 x Phillips Bits (Each 2Pcs: PH0 PH1 PH2 PH3) 8 x Flathead Bits (Each 2Pcs: 1/8 3.2mm 5/32 4mm 3/16 4.8mm 1/4 6.3mm) 2 x Countersink Bits (3/32 2.4mm 1/8 3.2mm) 1 x Allen Wrench 1 x Storage Case