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Material: HSS steelColor: GoldenSurface treatment : Titanium platingThe 3 cutters come in the following sizes increments of 2mm : 4 - 32mm ,4 - 20mm, 4 - 12mm.Ideal for using to cut holes in a variety of materials Including steel, brass, wood, plastic, etc. 2 fluted edges for faster, smoother cutting.3 sided shanks prevent slippage when in chuck.Package Includes:3Pcs HSS Drill Bit Set*Color can be slightly different from actual due to screen or camera resolution.