Micro Bit Replacement Slotted Bit Pack, 10 Piece. Includes: Slotted 0.8, 1.2, 1.5, 1.8, 2.0, 2.5, 3.0, 3.5, 4.0mm. 1.1in/28mm OAL. Chrome-vanadium-molybdenum steel, hardened, on 4mm hex stock.Micro Bits Slotted Sizes: 0.8, 1.2, 1.5, 1.8, 2.0, 2.5, 3.0, 3.5, 4.0mm Micro Precision Bits on 4mm Hex DriveHardened for Extreme DurabilityBits of Exclusive CRM-72 Tool SteelExact fit machined tips
