CC2430 self centering drill bit set fits for 1 or 4 In hex shank drill, 6, 8, 10 self centering drill bit set, countersink drill bit for hinge and wood. Including 3 or 32Inch, 7 or 64Inch, 1 or 8Inch drill set. Note: Pease check your accessory model, drill model to the compatibility. Our set can perfectly replace worn or damaged drill bits. Self-Centering Hinge Drill Bits are perfect for cabinet and door hinge installation, and other precision woodworking applications, using for drilling pilot holes, installing hinges, strike plates and other Hardware. After tens of thousands of professional tests, it meets the quality standards of the for original factory. Ultra hard steel increases high pressure resistance, service life, and durability Self-Centering design prevents wood grain from changing the stroke of the drill bit and damaging the wood, facilitating precise drilling Containing a guide sleeve for accurate positioning of guide holes during installation. The system offers fast, one-handed load and release of bits so that you can replace without re-chucking for less downtime and more productivity,up to 33 percent faster than other systems. Colour:Black Material:steel Package Contents: 1set x self centering drill bit(3pcs) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.