Features:*This is the New 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 heat.*It is very suitable for using to cut holes in a variety of materials including thin steel, brass, wood, plastic, etc. Specification:*Material: High Speed Steel (HSS)*Color: Silver*Flute: Spiral*Shank type: Triangle handle*Size:4-12mm (5 Steps): 4mm, 6mm, 8mm, 10mm, 12mm4-20mm (9 Steps): 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm4-32mm (15 Steps):4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm*Quantity: 3pcsPackage Contents:3*Step Drill BitNote:1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.