Wood Plug Cutter Drill Cutting Tool Drill Bit Set Straight And Tapered Taper Woodworking Cork Drill Bit 5/8in 1/2in 3/8in 1/4in Description: Color: As the pictures show Material: HSS Black chamfer drill body material: steel 45 Model62A56D7206G0706 Features: Four piece set includes bits for drilling pilot holes for screw sizes #5, #6,#8,#10 and #12 Special designed steel counter sleeve countersinks or counter bores pilot holeAdjustable 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 setscrew Dimension: 5# 1.98mm(0.07795 inch)x 50mm(L) 6# 2.38mm (0.0937 inch) x 55mm(L) 8# 2.78mm (0.1094 inch) x 60mm(L) 10# 3.175mm (0.125 inch) x 63mm(L) 12# 3.56mm (0.14 inch) x 65mm(L) Shank: 1/4 hex shank Specification: 5/8"(wood plug 15.8mm) 1/2"(wood plug 12.7mm) 3/8"(wood plug 9.5mm) 1/4"(wood plug 6.3mm) Material: 45# Carbon Steel Product List: (optional) 10Pcs A: Claw Drill x 4, Countersunk Drill x 5, Allen Key x 1 10Pcs B: Barrel Drill x 4, Countersunk Drill x 5, Allen Key x 1 14Pcs Set: Claw Drill x 4, Barrel Drill x 4, Countersunk Drill x 5, Allen Key x 1 notes 1. . Manual measurement, please allow 1~2mm error, thank you.