Specification:Material: S2 steelColor: as picture showsLength: approx. 50mmShank diameter: approx. 6.25mm (1/4 inch)Quantity:12pcs (12 different sizes)Specification: T5, T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, T40Specification Handle Diameter Length Shaft Diameter Hole DiameterT5 6.35mm 50mm 3mm 1.37mmT6 6.35mm 50mm 3mm 1.65mmT7 6.35mm 50mm 3mm 1.99mmT8 6.35mm 50mm 3.5mm 2.3mmT9 6.35mm 50mm 3.8mm 2.5mmT10 6.35mm 50mm 4mm 2.72mmT15 6.35mm 50mm 4.5mm 3.26mmT20 6.35mm 50mm 5mm 3.84mmT25 6.35mm 50mm 5.5mm 4.4mmT27 6.35mm 50mm 5.8mm 4.96mmT30 6.35mm 50mm 6mm 5.49mmT40 6.35mm 50mm 6.35mm 6.6mmNote:Please allow 1-5mm errors due to manual measurementItem color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated sameDescription:Magnetic bits set- Magnetic bits are firmly fixed on screwdriversHigh quality- Those torx screwdriver bits are made of S2 steel which is a commonly used material in hardware with high hardness.Application- Fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth.Hexagonal shank diameter: 6.35cm (1/4 inch) Hexagonal shank diameter, clamping and fastening, not easy to slip, safe to useA variety of specifications: a variety of drill bits can be selected to meet different needsPackage included:Choice 2:12pcs x Torx screwdriver bit setincludes:Choice 2:12pcs x Torx screwdriver bit set