Special features Compatibility: Suitable for all common cordless screwdrivers and bit holders. Practical storage: Supplied in a sturdy plastic box that is easy to store. Quick-change system: Bit holder with quick-release chuck for quick and easy changing of bits and drills. Technical data Bit size: 25 mm Material: Chrome-vanadium for long life and extra strength Drill sizes wood drills: 3, 3.5, 4, 4.5, 5, 6 mm (hex) Drill sizes HSS drills: 1, 1.5, 2, 2.5, 3, 3.2, 3.5, 4 mm (hex shank) Bits: Slotted 4, 5, 6, 7 PH 0, 1, 2, 3 TX 10, 15, 20, 25, 27, 30, 35, 40 Included as standard 1x Bit holder with quick-release chuck 6x Wood drills with hex shank (3, 3.5, 4, 4.5, 5, 6 mm) 8x HSS drills with hex shank (1, 1.5, 2, 2.5, 3, 3.2, 3.5, 4 mm) 8x 25 mm chrome-vanadium bits: Slotted 4, 5, 6, 7 PH 0, 1, 2, 3 TX 10, 15, 20, 25, 27, 30, 35, 40