5pcs/Set Countersink Drill Woodworking Drill Bit Set Drilling Holes for Screw Sizes #5 #6 #8 #10 #12

--4 piece set includes bits for drilling holes for screw sizes #5, #6,#8,#10 and #12. --Special designed steel counter sleeve countersinks or counter bores hole. --Adjustable counter sleeve depth with Allen wrench Standard hex shank is quick change and compatible. --Drilling length can be adjusted for various length screws simply by loosening and tightening the setscrew.Description Type Bicycle saddle Material polyurethane Applicable models mountain sports cars size one size Color 189 black red 189 black blue 188 black red 188 black blue Package List 1 seat Note The colors deviation might differ due to different monitor settings Manual measuring please allow 1 3mm errorthank you