ITEM NAME:7pcs 3-10mm Drill Bit Set Woodworking Countersink Chamfers Home Tools #JT1 Product Description Description: 7pcs 3-10mm Drill Bit Set Woodworking Countersink Chamfers Home Tools Specification: Material:Bit HSS 4241, titanizing  Middle chamfer drill: Steel 45 Color: as shown Product specification: Single flute edge chamfer 90 degree. Great drill accessory for any work shop backed by manufacturer's lifetime warranty. Heat treated & tempered high-carbon steel with titanium coating for superior cutting power. Use on steel, aluminum & other metals, plastic or wood. Enlarge or countersink holes, deburr edges, 15-degree chamfer. Type: drill bit set Black chamfering drill bit material: Steel No. 45 Three point woodworking drill diameter: 3mm,4mm,5mm,6mm,7mm,8mm,10mm / 0.12",0.16",0.20",0.24",0.28",0.31",0.39"(approx.) Chamfer diameter 3mm,4mm,5mm,6mm,7mm/0.12", 0.16", 0.20",0.24",0.28" drill bit: 15.8mm / 0.62 "(approx.) Chamfer diameter 8mm,10mm/0.31",0.39" drill bit: 17.8mm / 0.71" Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement. Included: 7pcs X Woodworking Chamfers.Enlarge or countersink holes, deburr edges, 15-degree chamfer. Included: 7pcs X Woodworking Chamfers. Material:Bit HSS 4241, titanizing Middle chamfer drill: Steel 45. Single flute edge chamfer 90 degree.