Features:Brand new and high quality. For use in wood and plastic. Adjustable counter sleeve depth with a wrench. Drill and countersink for wood screws without changing bits. Countersink or counter bore clean, smooth holes for screws and fasteners. Special designed steel counter sleeve countersinks or counter bores pilot hole. Five piece set includes bits for drilling pilot holes for screw sizes 6,8,10,12 and 14. Drilling length can be adjusted for various length screws simply by loosening and tightening the setscrew.
Specification:Shank: Round shank. Material: HSS 4241( Ti Titanium-coated). Black chamfer drill body material is 45 steel. Includes countersink sizes: 6, 8, 10 12 14. Color:As the pictures show.