1) 19pcs drill set 2) HSS and carbon steel 3) YG8C cutting point tip 4) Drilling ... for concrere, bricks, stones and metal 19pcs set HSS twsit drill and masonry drill setPacked in Blow foan case ... specifiations:Titanium-coated and TCT masonry drill bit set. Incl: HSS Titanium 1, 1.5, 2, 2.5, 3, 3.5 ... , 8 and 9mm. In soft-grip hinged storage case. 19pcs HSS twist drill set