Countersink Drill Bit Set – 4 Sizes, Alloy, Depth Stop

Countersink Drill Bit Set – Alloy Build, Spiral Flute & Adjustable Depth Stop

Achieve perfectly flush, professional-looking screw holes every time with this Countersink Drill Bit Set. Built from durable cobalt steel alloy and engineered with a smart spiral flute design, this set is the ideal companion for woodworking enthusiasts and DIY professionals alike. Whether you're working with natural wood, plywood, particleboard, MDF, or synthetic fiberboard, this set delivers clean, precise countersunk holes with minimal effort.

Why Choose This Countersink Drill Bit Set?

• Premium Alloy Construction: Made from high-grade cobalt steel alloy for excellent cutting performance, superior wear resistance, and long-lasting durability that holds up to daily use.
• 4 Versatile Drill Bit Sizes: Comes with four interchangeable replacement bits — 2.8×80mm, 3.2×80mm, 3.5×100mm, and 4×100mm — to handle a wide range of screw sizes and project requirements.
• Anti-Clogging Spiral Flute Design: The precision-ground spiral edges rapidly clear wood chips and debris away from the hole as you drill, ensuring a smooth, uninterrupted drilling process and cleaner results.
• Adjustable Depth Stop: The integrated depth limiter with cross-reference scale lets you set the exact drilling depth to match your screw length — no more over-drilling or guesswork. Great for consistent, repeatable results across a project.
• CE Certified: This set meets CE certification standards, giving you added confidence in its quality and safety.
• Complete Kit: Everything you need is included right out of the box — no extra purchases necessary.

Full Specifications

• Material: Cobalt Steel Alloy
• Replacement Drill Bit Sizes: 2.8×80mm | 3.2×80mm | 3.5×100mm | 4×100mm
• Countersink Drill Length: 80mm (3.15 inch)
• Widest Diameter: 30mm (1.18 inch)
• Certification: CE
• Suitable For: Natural wood, plywood, particleboard, MDF, synthetic fiberboard
• Not Recommended For: Metals and steel plates
• Country of Origin: Made in China

What's in the Box?

• 1 × Countersink Drill Body (with adjustable depth stop)
• 4 × Replacement Drill Bits (2.8mm, 3.2mm, 3.5mm, 4mm)
• 1 × Hex Wrench

Perfect For

Furniture assembly, cabinet making, deck building, shelving, joinery, and all types of woodworking and DIY construction projects. The adjustable depth stop and multiple bit sizes make this set especially useful for projects requiring consistent screw depths across many holes.

Related Products You May Like

• 10pcs Durable Gold Blade Nut Metal Universal Trimmer Accessories – Replacement Parts
• 10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips
• 10/20mm Diamond Flat Grinding Wheel – Dry and Wet Use Heavy Duty Concrete Grinder Wheel

Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

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

A: This countersink drill bit set is designed for use on natural wood, plywood, particleboard, MDF (medium-density fiberboard), and synthetic fiberboard. It is not recommended for use on metals or steel plates.

Q: How does the adjustable depth stop work?

A: The depth stop collar slides along the drill bit shaft and can be locked at any position using the included hex wrench. A built-in cross-reference scale allows you to align the stop to your desired drilling depth precisely, so every hole is drilled to the same consistent depth to match your screw length.

Q: Can I replace individual drill bits in the set?

A: Yes! The set is designed with interchangeable replacement bits. You can swap between the four included sizes (2.8mm, 3.2mm, 3.5mm, and 4mm) using the hex wrench, making it easy to switch between screw sizes without needing multiple separate tools.

Q: What makes the spiral flute design beneficial for woodworking?

A: The spiral flute channels on each drill bit are engineered to continuously pull wood chips and dust up and out of the hole as you drill. This prevents debris from building up inside the hole, reducing the risk of clogging and helping you maintain a clean, smooth drilling process from start to finish.

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.