1. One-Click Processing: Drill bits perform hole drilling, tapping and countersinking in one operation. 2. 1/4 inch Hex Shank Quick Change: 1/4 inch hex shank Suitable for most hand electric drills, cordless drills, Impact drills. Fits into power tools more easily and securely. 3. Titanium Coating: Titanium coating Classic HSS construction with titanium coating for capability and durability. 4. Quick Change Adapter: Maximize efficiency with the included quick change adapter that allows you to switch between different sizes easily. 5. Easy-to-Read Labels:Each tap drill is engraved with a label, which is convenient for you to choose the size that suits you. Laser-engraved size markings on each drill provide superior convenience and accuracy. Specification: Color: gold + black Material: High speed steel (HSS4341) Surface treatment: Titanium Coted 1/4 inch hex shank (Quick change for impact drill) Size:M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5 Shank Type: Hex Tool Flute Type: Spiral Package Contents: 6pcs tap drill bits set 1pcs quick change adapter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.