4pcs HSS Countersink Drill Bit Set Woodworking Counter Bore Screw Tool #6 #8 #10 #12

Description: 4pcs HSS Countersink Drill Bit Set Woodworking Counter Bore Screw Tool #6 #8 #10 #12 Specifications: Material: HSS Drill 4241(Titanium-coated) Black chamfer drill body material: steel 45 Countersink sizes: #6, #8, #10, #12 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 Features: Special designed steel counter sleeve countersinks or counter bores pilot hole. Adjustable counter sleeve depth with Allen wrench. Drilling length can be adjusted for various length screws simply by loosening and tightening the screw. Pre-drill and countersink to drive screws flush with the material surface or deep hole counter boring for driving screw heads below the surface. Ultra-sharp cutting flute clears chips efficiently and leaves a clean, smooth hole. Adjustable drill bit length for desired screwed depth, and features a flattened shank for a no-slip countersink connection. Suitable for less than 25HRC hardness workpieces, such as carbon steel, sheet iron, insulation board, PVC board, wood, etc. Package Included: 4X Countersink Drill Bits 1X Hex Wrench