ITEM NAME:50Pcs Titanium Coated HSS High Speed Steel Drill Bit Set Tool 1/1.5/2/2.5/3mm In.HSS drill bit set for wood, plastic and aluminum. Material: HSS 4241. 10 x 3mm Drill Bits. Containing sizes: 1mm, 1.5mm, 2mm, 2.5mm, 3mm. Surface Finishing: Titanium Coated. Type: Drill Bit Set. 10 x 1mm Drill Bits.