Description: Because of the heat treatment and grinding process, the tap drill bit has smooth surface to ensure fast chip removal, which greatly improves drilling efficiency. Designed with bevelled flute, the cutting edge reduces wear during cutting, making it sharper and more long-lasting. Forged from high-quality high speed steel, the tap drill bits with titanium coating feature longer service life. The advantages of high toughness, hardness and good wear resistance are thanks to the excellent cobalt. This tap drill bits set includes 6 taps with different specifications: 6-32NC, 8-32NC, 10-32NC, 10-24NC, 12-24NC, 1/4-20NC, which can meet your needs for different applications. Combining drilling, tapping and countersinking at one, the tap drill bits save your time and effort on woodworking and metalworking. Item Name: Tap Drill Bits Material: High Speed Steel Color: Black Shank Type: Hex Shank Process: Titanium Coated Specifications: 6-32NC, 8-32NC, 10-32NC, 10-24NC, 12-24NC, 1/4-20NC Features: Fast Chip Removal, High Hardness, Long Service Life Size Details: Shank Diameter: 6.5mm/0.25" (Approx.) Tap Drill Length: 6-32NC, 8-32NC: 54mm/2.13", 10-32NC, 10-24NC: 57.5mm/2.26", 12-24NC, 1/4-20NC: 58mm/2.28" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 6 x Tap Drill Bits