5pcs Countersink Drill Bit Set – 8mm Round Shank Woodworking Pilot Hole & Chamfer Bits with 8mm Cutter Diameter, Hex Keys and Replaceable HSS Twist Bits (2.8, 3.0, 3.2, 3.5, 4.0mm)

Features: Adjustable Drill Length -- The drill bit length can be customized to fit different screw depths. Before use, always ensure the bit is securely locked by tightening the hex set screw with the provided Allen wrench to avoid movement during drilling. Proper Speed Control -- For optimal results and to avoid burning or dulling the drill bit, use a moderate drilling speed, especially when working with hardwoods. Countersink Blade Alignment -- Make sure the countersink blade is properly aligned with the pilot bit to achieve a clean and accurate conical hole for screw heads. If misaligned, adjust or replace the bit before drilling. Routine Maintenance -- After each use, remove wood debris from the countersink blade and apply a small amount of machine oil to prevent rusting. Store the tools in a dry place. Pilot Bit Diameter → Recommended Screw Size 1.Softwood 2.8–3.0 mm → #6 3.0–3.2 mm → #8 3.2–3.5 mm → #10 3.5–4.0 mm → #12 2.Hardwood 2.8–3.0 mm → #6 3.2–3.5 mm → #8 3.5–4.0 mm → #10 Practical Recommendations 1.Kindly confirm the necessary product size before proceeding with your order. 2. As our products are measured manually, please allow for a 1-2 millimeter discrepancy between the actual measurements and the listed dimensions. 3. We strive to ensure that our images closely resemble the actual product; however, slight color differences may exist due to factors such as equipment, lighting, and monitors.

• [Broad Compatibility]: The 8mm (5/16") round shank is compatible with most electric drills, hand drills, and bench drills, allowing quick and stable attachment. Switch between tools seamlessly for maximum efficiency. It is recommended to pre-drill holes for screw sizes #6, #8, #10, and #12.
• [Accurate and Durable]: Equipped with an HSS pilot drill bit, this tool ensures precise hole positioning and smooth drilling, making it ideal for wood, particle board, and plywood. Strong resistance to wear and breakage for long-term use.
• [Built-in Countersink Cutter]: Features a 2-flute countersink blade that automatically carves an 8mm Dia. conical seat for screw heads. Achieve either flush or hidden screw finishes effortlessly, with no burrs or cracks on the wood surface.
• [Flexible and Secure]: The drill bit length is fully adjustable by simply loosening or tightening the included hex set screw with an Allen wrench. This allows for custom drilling depth, securely locked in place to prevent slipping during use.
• [Everything You Need]: Includes 5 countersink drill bits, 5 Allen wrenches, and 5 spare hex set screws. Whether you're a DIYer or a professional woodworker, this kit covers all your drilling and countersinking needs right out of the box.
• [Acquire With Trust]: We are committed to your satisfaction with AOKAIMIAR's products. Should you encounter any issues with our product, please reach out to us without hesitation. We are dedicated to resolving your concerns and ensuring your satisfaction. Trust our products for your next project and experience excellent product performance firsthand!