ITEM NAME:3pcs 6.5mm 8mm 10mm HSS CO Rotary Spot Weld Cutter Sawtooth Point Drill Bit #gib Store Home Promotion Hot Item Add to Fav.Material: HSS co cobalt containing material. Specification: 1 / 4 (6.5mm), 5 / 16 (8mm), 3 / 8 (10mm). Surface: titanium plating. 3 X Drill Bits. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures.