Description: The drill bit is made of carbon steel, with high hardness, excellent cutting power and good sharpening resistance. Used for drilling holes in wooden doors and windows. Wood Plug Cutter Tool Drill Material: 45# Carbon Steel Arbor: 3/8" (10mm) Round Shank Arbor Diameter: 9.3mm Size: 5/8" (15.8mm Wood Plug) 1/2" (12.7mm Wood Plug) 3 /8" (9.5mm Wood Dowel) 1/4" (6.3mm Wood Dowel) Decorative Dowels. Cuts plugs up to 22mm/23mm/25mm/26mm long 7pcs Woodworking Countersink Drill Bits: Material: High Speed Steel Size: 3mm(Dia) x 60mm(L) 4mm(Dia) x 75mm(L) 5mm(Dia) x 85mm(L) 6mm(Dia) x 93mm(L) 7mm(Dia) x 10mm(L) 8mm(Dia) x 11mm(L) 10mm(Dia) x 12mm(L) 6PCS 5 Countersink Drill Bits: Material: High Speed Steel Surface Treatment: Titanium Coating Edge: 90 Degree Handle Diameter: 1/4" Hex Shank Size: 6mm(1/4"), 8mm(5/16"), 9mm(3/8"), 12mm(1/2"), 16mm(5/8") and 19mm(3/4") 3PCS High Speed Steel Step Drill Bit Set: Material: High Quality Titanium Plated Steel Size: 4-32mm (4mm, 6mm, 8mm,