Features: Brand new and high quality Special designed steel counter sleeve countersinks or counter bores- pilots hole. Adjustable counter sleeve depth with Allen wrench. Standard hex shank is quick change 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 crew. Specifications: Name: countersunk drill Packing: plastic box Material: cutter head YG8 alloy, cutter body 45# carbon steel, surface- sprayed Packaging size: 18x18x95mm Weight: 5Pieces, 155g Uses: For wood, aluminum alloy screw counterbore, opening Package Includes: 5Pcs/Set x Countersink Drill note: 1. 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. 3. If you have any demand for more products,please contact us.