NEIKO 10218A Countersink Drill Bit Set — 1/4" Tri-Flat Shank, 5-Piece, M2 HSS

Premium NEIKO Countersink Bit Set for Wood and Metal

The NEIKO 10218A 5 Piece Counter Sink Drill Bit Tool Set is designed for woodworkers, carpenters, machinists, and DIY enthusiasts who value clean, flush fastening. Each bit features an 82-degree tip and a five-flute design to help create sharp, sink-friendly holes that accommodate screws with a neat finish. Constructed from sturdy M2 high-speed steel, these bits are built for longer life while delivering consistent performance across soft metals, wood, plastic, and other machinable materials.

Key benefits come from precision machining and practical design. The 1/4 inch tri-flat shank promotes secure grip in handheld drills, while the five-flute geometry reduces vibration for smoother drilling. The set is housed in a lightweight aluminum case for easy storage and transport, making it a reliable addition to any shop or job site.

What’s included and why it matters

• PRECISION MACHINED TIPS: 1/4" tri-flat shanks with an 82-degree tip, optimized for sinking holes in wood, machinable metals, mild steel, fiberglass, and plastics; compatible with common handheld drills.
• M2 HSS MATERIAL: Built from high-quality M2 high-speed steel for extended life and efficient countersinking performance.
• FIVE-FLUTE DESIGN: Each bit reduces vibration for smoother drilling and more controlled countersinking in diverse materials.
• BIT HOLDER CASE INCLUDED: An aluminum case keeps the five bits organized and portable.
• BIT SIZES: 1/4", 3/8", 1/2", 5/8", and 3/4" are included for a range of countersinking needs.

Real-world use cases

Use these bits to prepare screw holes that sit flush with the surface, supporting clean joints in cabinetry, furniture making, and metalworking projects. The bits can help create countersinks in wood panels for hidden hardware and in mild steel or other plastics for precise joinery. Whether refinishing a cabinet face or building a metal bracket, the set offers a versatile solution for preparing joints that require accurate countersinking without compromising material integrity.

• Furniture and cabinetry: clean, flush screw recesses for a polished look.
• Metal and plastic work: countersink holes in mild steel, fiberglass, and other machinable materials.

For best results, use steady pressure and let the bit do the work. The results are best understood as possibilities for achieving neat, flush fastening rather than guarantees of outcome.