Screw Tap Drill Bits Set 1/4" Hex Quick Change 6Pcs Woodworking DIY Supplies
HRC89 M3-M10 Combination Drill Tap Bit Set Coated Deburr Countersink Bits. (Can drilling without coolant, with coolant, service life will be longer. Type: Tap Drill Bit. Shank: 1/4" (6.35mm) hex shank. ).