8pcs Woodworking Router Bit Set: 4 standard router bits and 4 four-tooth fiber router bits, can be used with bench drill, hand drill or other professional drilling machines. To prevent slipping or eccentricity when drilling, we recommend using a bench drill or clamping the drill bit [7 Cone Drill Bits for Wood] Made of high quality carbon steel with titanium coating, the drilling length can be adjusted The chamfer adjusted for different lengths consists of 5 grooves, which can discharge the wood faster when used. 6pcs 6.35 Hex Cone Drill Bit Set to 90 Degrees at 1mm - Made of standard high speed steel. Through high frequency quenching for heat treatment, HSS cone drill bits have high toughness and hardness. Titanium coated chamfer set is rust-proof and has a long service life 3pcs Step Cone Drill Bit Set: Forged from titanium coated high speed steel, the hex shank of the step drill bits adopts a serrated design ensures the electric drill clamps more firmly, suitable for drilling