<p>Adjustable Drilling Length: Can be adjusted for different screw lengths simply by loosening and tightening the fixing screw.</p> <p>Multi-size: One tool for multiple uses, our countersink drill bit set 5 kinds of sizes: 2.8 x 8 mm / 3.0 x 8 mm / 3.2 x 8 mm / 3.5 x 8 mm / 4 x 8 mm to meet your needs.</p> <p>Premium Material: Made of high quality alloy steel. It is very suitable for drilling wood holes of various sizes. A versatile tool, improves work efficiency.</p> <p>Usage: Compatible with drills with chuck, for drilling on wood or parquet, for DIY, household and general construction or engineering use, etc.</p> <p>Efficiency: The spiral flute with a center drill will quickly discharge chips from the hole, the five-edge chamfer design effectively prevents debris accumulation and improves drilling efficiency.</p> <p>Feature:</p> <p>Stored in a sealed package with good protections.</p> <p>Specially used on metal and steel plate, gives a quick and easy cutting.</p> <p>Suitable for wood processing.</p> <p>Drill and countersink for wood screws without changing the bit.</p> <p>Depth-adjustable countersink with an Allen key.</p> <p>Precautions:</p> <p>1. Check the integrity of the hole opener before use and tighten the hole inserter when loading the drill.</p> <p>2. When working, the hole opener must be perpendicular to the workpiece.</p> <p>3. After positioning, the propulsion force is slightly applied during the drilling process.</p> <p>4. When drilling, the rotation speed should not be too low, thus preventing the blade from getting stuck and causing chipping.</p> <p>5. Coolant should be added during the opening process to prevent damage caused by excessive temperature.</p> <p>Specification:</p> <p>Name: Drill Bit Set.</p> <p>Material: YG8 Alloy.</p> <p>Color: Silver and Orange.</p> <p>Size: 2.8 x 8mm/3.0 x 8mm/3.2 x 8mm/3.5 x 8mm/4 x 8mm.</p> <p>Shank Type: Round.</p> <p>Shank Diameter: 8mm.</p> <p>(Note: Please allow 1-3mm error due to manual measurement and slight color difference due to light and screen.)</p>