12Pcs Compound Screw Tap Bit Set M3/4/5/6/8/10 Hex Spiral Tap Countersink Drill Soft Metal Tapping Chamfering Extension Rod Tool

[Features]: 1. "X" shaped openings, reduce skidding when drilling. High hardness, good toughness, convenient tapping. 2. Hole tapping chamfering in one, easy to operate, hand drill, bench drill, hex chuck tapping machine available. 3. Taps are designed with spiral flutes and the chip clearing process would be better. 4. Contains a variety of sizes, which can be used for tapping various threads. [Specifications]: Material: High speed steel 4341 Color: Sliver / Titanium / Blue Shank: Common 1/4" Hex Shank (6.35mm) Processing: wood, plastic, aluminum, tin alloy, magnesium alloy, workpiece thickness less than 5mm. [Package includes]: According to your choice [Note]: Coated with a little oil before working on the tap, you can make work more smoothly point, and can extend the life of the tap.