Features:Brand new and high qualitySpecial designed steel counter sleeve countersinks or counter bores- hole.Adjustable counter sleeve depth with Allen wrench.Standard shank is compatible.Drill and countersink for wood screws without changing bits.Drilling length can be adjusted for various length screws simply by loosening and tightening the sets.Specifications:Name: countersunk drillPacking: plastic boxMaterial: cutter head YG8 alloy, cutter body 45# carbon steel, surface- sprayedPackaging size: 18x18x95mmWeight: 5Pieces, 155gUses: For wood, aluminum alloy screw counterbore, openingPackage Includes:5Pcs/Set x Countersink DrillNote:Manual measuring, please allow a little 1 2mm error, thank you.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please allow a little color difference.