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
2.5–2.8 mm → #6
3.0–3.2 mm → #8
3.2–3.5 mm → #10

2.Hardwood
2.8–3.0 mm → #6
3.2–3.5 mm → #8

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.