Three Piece 120 Degree Countersink Bit Set With Drill Guide Sizes 21 30 40 Self Centering Pilot Cutters Made From High Speed Steel For Precise Holes And Clean Finishes

Three-Piece 120 Degree Countersink Set in HSS for Aluminum
✔️ 1/2 in dia (12.7 mm), 3-flute HSS, 1/4-28 shank for #21 #30 #40

This three-piece countersink bit set includes 120-degree cutters with a self-centering pilot, designed for aluminum and other soft metals. It’s a handy choice for cabinetry, metalworking, and DIY projects where clean, precise holes and flush screw seating matter. Microstop countersink depth adjustment (tool not included) helps repeatable results.

✅ 3-piece set of 120° countersink cutters with 1/2" diameter; sizes #21, #30, #40
✅ 3-flute integral fixed pilot for cutting accuracy
✅ 1/4x28 threaded shank fits microstop countersink tools (not included)
✅ High-speed steel construction; suited for aluminum and soft metals
✅ Self-centering design for precise holes and clean finishes

💡 What is a countersink bit set used for in precision drilling and finish work? This handy tool helps you seat screws flush and create neat countersinks in aluminum and soft metals. - handy for cabinetry, metalworking, and DIY projects requiring clean screw recesses - features self-centering pilot and 3-flute design for consistent depths - pairs with standard microstop countersink tools for repeatable results