Made of high quality material, durable and high precision <br>4-flute wood bits for a cleaner, faster cut than flat bits and tri-flute wood drills <br>Has its own self-tapping thread for better positioning and punching. <br>High quenching cutting edge, four-groove chip removal, helping to improve work efficiency <br>Efficient chip removal improves cutting performance and extends tool life <br>Suitable for electric screwdriver of 1/4 hex shank power tool and wood depth operation. <br>A necessary accessory set for woodworking drills and impact drivers <br><br>Specifications: <br>Material: High carbon steel <br>Length: 165mm <br>Size:10mm 12mm 14mm 16mm 18mm 20mm 22mm 25mm <br><br>Package content: <br>8Pcs Four Slot Working Drills <br><br><b>Note:</b> <br>1. Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. <br>2. The colors may be different as the difference display. Please understand