Pre-drill and countersink to drive screws flush with the material surface or deep hole counter boring for driving screw heads below the surface. Ultra-sharp cutting flute clears chips efficiently and leaves a clean, smooth hole. Adjustable drill bit length for desired screwed depth, and features a flattened shank for a no-slip countersink connection.
- Countersink or counterbore clean, smooth holes for screws and fasteners.
- Drilling length can be adjusted for various length screws simply by loosening and tightening the set.
- Speed shank eliminates tool from slipping in drill chuck
- Fits all brands
- Allen wrench for drill bit depth adjustments and replacement
- High-speed steel material, high strength, good willful
- 7 Sizes in one drill bit set(3mm/ 4mm/ 5mm/ 6mm/ 7mm/ 8mm/ 10mm), which meet your different needs perfectly.
- 7pcs x Smart Drill Bit
- 1pc x L-wrench