5Pcs Countersink Drill Bit Set Round Shank Power Tools and HSS Quick Change Countersink Drill Bit for Wood Drilling Plastic Soft Metal by

Description: Includes bits for drilling pilot holes. Can drill the screw holes and keep on the same axis after screw in screw nut below the board. Apply to with a clamp or joint drilling machine suitable for drilling in the hard wood and wood floor machine screw for wood screw. High strength and hardness.Easy to use durable and practical. Widely Use - Great for wood openings reaming chamfering screw head and so on.Suitable for wooden planks plywood aluminum board fiberboard particle board plastic PVC board and other various soft material chamfer. Features: *100% brand new and high quality *Made of high-quality materials strong and practical *Specially designed steel counterbore or counterbore guide hole. *The depth of the counter bushing can be adjusted using an Allen wrench. *The standard hexagon handle can be replaced quickly. *Drills and countersunk heads are used for wood screws no need to replace the drill bit. *Just loosen and tighten the fixing screws you can adjust the drilling length of screws of various lengths. Specifications: Material: Head: YG8 alloy Blade Body: 45# carbon steel Surface: spray Color: As Pictures Show Size: As Pictures Show 10MM Shank:2.8mm*10mm 3mm*10mm 3.2mm*10mm 3.5mm*10mm 4mm*10mm(Approx.) 8MM Shank:2.8mm*8mm 3mm*8mm 3.2mm*8mm 3.5mm*8mm 4mm*8mm(Approx.) Warm Tips: 1> The Best use of this product is to use a BENCH drill because the hand electric drill is not fixed in. 2> The operation process the drill bit (especially the 3mm to 4mm) is prone to bend and break! 3> Try to keep the drill vertical while drilling so as not to be uneven. Package: 5 x Countersink Drill Bit