4 Flute Countersink Drill Bit – Adjustable Depth 1/4" Hex Shank

4 Flute Countersink Drill Bit Set with Adjustable Depth & Bearing – 1/4" Hex Shank

Upgrade your woodworking toolkit with this precision-engineered 4 Flute Countersink Drill Bit. Designed for both hobbyists and professionals, this bit delivers clean, accurate counterbores in hardwoods and softwoods alike. The four-edged design and premium 6542 high-speed steel construction ensure long-lasting performance, heat resistance, and rust protection job after job.

Made in Mainland China.

Key Features

• Four-Edged Design: Long-lasting four-flute construction ensures precise and efficient counterboring in hardwoods for a clean, professional finish.
• Adjustable Depth Control: Built-in limit ring with an etched scale and hex set screw lets you dial in your exact drilling depth — preventing over-drilling and delivering perfectly consistent sinkholes every time.
• Premium 6542 Steel: High-speed steel construction provides superior longevity, heat resistance, and corrosion protection compared to standard drill bits.
• Multiple Size Options: Available in 2.8mm, 3.2mm, 3.5mm, and 4.0mm diameters to suit a wide range of woodworking applications.
• 1/4" Hex Shank: Universal 1/4" hex shank fits most standard power drills and drill drivers for quick, tool-free bit changes.
• Bearing-Guided Operation: Integrated bearing ensures smooth, stable rotation for accurate countersinking with minimal wobble.

Specifications

• Material: 6542 High-Speed Steel / Aluminum Alloy body
• Colors Available: Red, Gold, Blue
• Dimensions: 3.7 × 3.7 × 14 cm
• Shank Type: 1/4" Hex
• Available Diameters: 2.8mm, 3.2mm, 3.5mm, 4.0mm

Package Contents

• 1 × Countersink Drill Bit (size as selected)

Notes

• Monitor brightness and lighting conditions may cause slight color variation from images shown.
• Please allow minor measurement tolerances (±0.5mm) for listed dimensions.

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Frequently Asked Questions

Q: What shank size does this countersink drill bit use?

A: This countersink drill bit features a universal 1/4" hex shank, making it compatible with the vast majority of standard power drills, cordless drills, and drill drivers without needing any adapters.

Q: Can the drilling depth be adjusted on this countersink bit?

A: Yes! The bit includes a built-in adjustable limit ring with an etched depth scale and a hex set screw. Simply loosen the screw, slide the ring to your desired depth marking, and re-tighten — ensuring perfectly uniform countersink depth across every hole.

Q: What materials can this drill bit be used on?

A: This 4 flute countersink bit is primarily designed for woodworking applications including hardwoods, softwoods, plywood, and MDF. The premium 6542 high-speed steel construction provides durability for demanding woodworking projects.

Q: Which sizes are available for this countersink drill bit set?

A: The bit is available in four diameter options: 2.8mm, 3.2mm, 3.5mm, and 4.0mm, allowing you to match the right size to your screw and wood type for a clean, flush finish.