"About this item This set includes 4 standard cutters and 4 four-flute bevel cutters. Deep cutting diameter sizes include 1/4"; 3/8"; 1/2"; 5/8"" (6 mm / 10 mm / 13 mm / 16 mm. Shank Diameter: 10 mm. Material: Carbon steel, titanium coated for long service life. 8 Pieces Plug Cup Set Creates perfect plugs for drilling holes. Use standard countersinks to remove imperfections in wood. Chamfer cutters create tapered plugs to fill countersunk holes. Very useful for cutting solid oak dowels for furniture or removing old nails from the floor when removing floorboards. Their ingenious use awaits your discovery. Features: Includes 4 sizes of standard countersinks (5/8"" 1/2"" 3/8""1/4"") and 4 four-edged countersinks. Perfect plugs easy to drill with high carbon steel materials for sharp drill holes. Chamfer cutters make tapered plugs to fill countersunk holes. Standard cutters remove imperfections in wood. Can be used with bench drill, hand drill and other professional bench drills. Very useful for cutting wood, making dowels, drilling countersunk holes. Specifications: Color: Silver Material: High carbon steel Surface treatment: General hardening treatment Handle type: Round handle Size: 5 /8", 1/2", 3/8", 1/4 Hole diameter: 6 mm, 10 mm, 13 mm, 16 mm Shank Diameter: 10 mm Package List: 8 * Wood Socket Drill Bits "