This is the New HSS Steel Large Step Cone Drill Titanium Bit Set Hole Cutter, which is made from 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 steel, brass, wood, plastic, etc treatment : Titanium plating The 3 cutters come in the following sizes increments of 2mm : 4 - 32mm ,4 - 20mm, 4 - 12mm. Set of 3 for jobs of all sizes. 2 fluted edges for faster, smoother cutting. 3 sided shanks prevent slippage when in chuck. Made from HSS steel. Material: HSS steel Color: Golden Quantity: 1 set (3pcs) Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, Thank you. Package includes: 1 x Set of 3Pcs HSS Drill Bit