1.tile drill bits&glass drill bit 2.15years professional manufacture 3.exported to USA,EUR,JAPAN 4.SIZE:3~14MM Professional manufactureThe blades are made of superhard thickened alloy which can be sharper and more durable;Applicable to ceramics,glass drilling;No. diameter/mm length/mmT-033 65 T-044 65T-055 65T-066 65T-077 70T-088 70T-099 70T-1010 80T-1212 80T-1313 80T-1414 80 packing: