ITEM NAME:4pcs flute countersink drill bit set chamfer woodworking power 3mm-6mm tool FT Specification: Brand new. Special designed steel counter sleeve countersinks or counter bores pilot hole Adjustable counter sleeve depth with wrench. Drill and countersink for wood screws without changing bits. Drilling length can be adjusted for various length screws simply by loosening and tightening the setscrew. Chamfer is 5 flutes, in the process of using, can discharge the wood more rapid, sink hole disposable drilled smooth, screw cap perfect embedded in the surface of workpiece. Package included: 4pcs x woodworking chamfer 1pc x hex shank Note: Please allow0.5-1cm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same..Drill and countersink for wood screws without changing bits. 1pc x hex shank. Special designed steel counter sleeve countersinks or counter bores pilot hole.