The countersink drill bit set and chuck is improved, high quality ultra-hard steel self-centering drill bit design More resistant to , than wood grain the drill bit travel and damage the wood, which facilitates precise drilling. It can perfectly replace worn or damaged bits and chucks. Double-sided hole design quickly and automatically discharges sawdust from the hole on both sides, without blocking the drill bit, helping you save time on removing sawdust. After repeated testing, it has better performance than the previous version. Centering drill bit set with superior drilling performance serves as a guide for centering required pilot holes for hinges. CC2430 self-centering drill bit set fits bits with 1/4" hex quick change shank. for hinges and wood. The standard hex shank allows for various sizes of chucks for size 6, ° 8 and ° 10 screws. Includes 3/32", 7/64" bit set. and 1/8 in. Note: Please check your accessory model and bit model to ensure compatibility. The drill guide is easy to install, plug and play, allows you to load and release bits quickly with one hand, so you can change bits quickly without re-clamping them, which reduces downtime and improves productivity., Weight: 0.26675933702 pounds, Manufacturer: Rtxbvg