8 woodworking drills including 4 standard cutters and 4 chamfered end mills with four teeth, can be used with bench drill, manual drill or other professional drilling machine. To prevent slippage or eccentricity while drilling, we recommend using a bench drill or securing the drill. Set of 7 high quality carbon steel countersink drills with titanium coating. The drilling length can be adjusted for different screw lengths. The chamfer has 5 flutes which can discharge the wood faster when in use. Set of 6 standard high speed steel 90 degree hex countersink drills. With high frequency quenching for heat treatment, HSS taper cutters have high toughness and hardness. Titanium coated, the chamfer cutter kit is rustproof and has a long service life. Set of 3 stepped conical drills forged from high speed titanium coated steel. Stepped drill bit hex shank adopts grooved design, help electric drill clamping firmer, suitable for drilling fine stainless steel, carbon steel, aluminum plate, plate iron and other materials. Satisfaction Guaranteed: We provide intimate after-sales service and promise 100% genuine, if there is any quality problems, you can return it unconditionally, customer satisfaction is our eternal pursuit. Product Features: - Set of 7 countersink drills for wood. Size: 3 mm in diameter x 60 mm in length. 4 mm in diameter x 75 mm in length. 5 mm in diameter x 85 mm in length. 6 mm in diameter x 93 mm in length. 7 mm in diameter x 10 mm in length. 8 mm (diameter) x 11 mm (L). 10 mm (diameter) x 12 mm (L). - 6 countersink drills. Shape: 5 flutes. Edge: 90 degrees. Length of the conical cutters: 48 mm. Material: 4241 high speed steel. Size: 6mm, 8mm, 9mm, 12mm, 16mm and 19mm. - 8 wood drills Dimensions: 5/8 (wooden plug 15.8 mm). Wooden stopper 12.7 mm. 9.5 mm. 6.3 mm. Stem: round. Shank diameter: 9.3mm. Material: 45 carbon steel. - Set of 3 high speed steel stepped drills: Material: titanium plated high speed steel Size: 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm) . 4-20 mm (4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm). 4-12 mm (4 mm, 6 mm, 8 mm, 10 mm, 12 mm).