1. Wood plug set includes 4 standard plug cutters and 4 four-tooth chambered cutters with 9.5mm(0.37inch).2. Our woodworking chamfer drilling tools can be mounted on electric drill, hand electric drill, bench drill, etc.3. They can be used to drill holes in wood, particle board, fiberboard, logs, plastic boards, PVC pipes, etc.Item Name: 23pcs woodworking chamfer drilling tool setItem Material: High carbon steel3-point Countersink Drill Bits Size: 3mm(0.11inch), 4mm(0.15inch), 5mm(0.19inch), 6mm(0.23inch), 7mm(0.27inch), 8mm(0.31inch), 9mm(0.35inch), 10mm(0.39inch)5 Flute 90 Countersink Drills Diameter: 6mm(1/4inch), 8mm(5/16inch), 9mm(3/8inch), 12mm(1/2inch), 16mm(5/8inch), 19mm(3/4inch). Diameter of 5 Flute 90 Countersink Drill: 1/4inch Tail Diameter of Wood Plug Cutter: 6mm(1/4inch), 10mm(3/8inch), 13mm(1/2inch) and 16mm(5/8inch) Diameter of Wood Plug Cutter: 9.5mm(0.37inch)Center Punch Length: 5.1inchcolor:As shownMaterial:carbon steelPackage Contents:7 x 3 point countersink bits8 x Cork Cutter6 x Countersink Bits1 x L-Wrench1 x Automatic Center PunchOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.