Adjustable Countersink Drill Bit Set 8mm Shank – 5 Sizes

Binoax Adjustable Countersink Drill Bit Set — Precision Woodworking Made Easy

Take your woodworking projects to the next level with this professional-grade Adjustable Countersink Drill Bit Set from Binoax. Engineered with a quick-change 8mm shank and available in five pilot sizes (2.8mm, 3mm, 3.2mm, 3.5mm, and 4mm), this set gives you the versatility to drill clean, flush-fitting screw holes in wood without splitting or tear-out. The carbide construction ensures long-lasting sharpness and durability — even through repeated, heavy use.

Made in Mainland China.

Key Features

• 5-Size Set: Includes 2.8mm, 3mm, 3.2mm, 3.5mm, and 4mm pilot bits to match a wide range of screw sizes
• 8mm Quick-Change Shank: Fits most standard drill chucks for fast, tool-free bit swaps
• Adjustable Depth Stop: Set your countersink depth precisely for perfectly flush or recessed screw heads every time
• Premium Carbide Material: Delivers exceptional hardness and wear resistance for long-lasting performance
• CE Certified: Meets European safety and quality standards
• Chamfer Design: Creates a clean, tapered seat for screw heads — ideal for cabinetry, furniture, and general woodworking
• Versatile Use: Suitable for softwood, hardwood, MDF, plywood, and more

Specifications

Perfect For

• Cabinet and furniture making
• Deck and fence construction
• DIY home improvement projects
• Joinery and trim work
• General woodworking and carpentry

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Frequently Asked Questions

Q: What sizes are included in this countersink drill bit set?

A: The set includes five pilot bit sizes: 2.8mm, 3mm, 3.2mm, 3.5mm, and 4mm — covering the most commonly used wood screw dimensions for a wide range of woodworking applications.

Q: What type of drill is compatible with the 8mm quick-change shank?

A: The 8mm shank is compatible with most standard corded and cordless drill chucks. The quick-change design allows for fast, effortless bit swaps without the need for a chuck key.

Q: Can these countersink bits be used on hardwood?

A: Yes. The carbide construction makes these bits well-suited for use on both softwood and hardwood, as well as engineered wood products like MDF and plywood. The adjustable depth stop helps prevent over-drilling on denser materials.

Q: How do I adjust the countersink depth?

A: Each bit features an adjustable depth collar that you can slide and lock into position along the shank. Simply set the collar to your desired depth before drilling to ensure consistent, uniform countersink holes throughout your project.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.