
Best drill bit and tap size
Greenlee DTAPKIT 6-32 to 1/4-20 6-Piece Combination Drill and Tap Set6 Pcs 1/4" HSS Spiral Hex Shank Combination Drill Screw Tap Bit Set (M3-M10) with Automatic Spring Loaded Center Punch Tool - GoldDEWALT DWADTQTR5SET Impact Ready 5-Piece Drill Tap Set, 1/4" CapacityGreenlee DTAP1/4-20 Combination Drill and ...