ITEM NAME:6pcs Tungsten Carbide TCT Glass Drill Bits Set Titanium Coated Power To #gib Store Home Promotion Hot Item Add to Fav.Surface finish: Titanium Coated. 6 X Glass Drill bits(3/4/6/8/10mm). Type: Spade Drill Bit. Category: drill bit set. Titanium coated for durable and longer life. Add to Fav. 6.35mm Hex shank for chucks and bit holder.