Product description:Vastar HSS Steel Large Step Cone Drill Titanium Bit Set Hole Cutter,which is made from high quality HSS steel, and with the Titanium coated to reduce friction and heatIt is very suitable for cutting holes in a variety of materials including steel, brass, wood, plastic, etc Material: HSS SteelFinish: Titanium Length:4-12mm Length: Approx. 6.7cm/ 2.64"4-20mm Length: Approx. 7.4cm/ 2.91"4-32mm Length: Approx. 10.2cm/ 4.02"The 3 Cutters Come in the Following Sizes:4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm)4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 14mm, 16mm, 18mm, 20mm)
4-12mm 9 steps (4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm)