The Irwin Glass & Tile Drill Bits are suitable for drilling glass, porcelain and ceramics. Drill with low RPM (300RPM recommended), water cooling is also recommended. Do not use on hammer setting. The Irwin IRW10507912 glass & tile drill bit 5 piece set includes the following pieces:4, 5, 6, 8 and 10mm

Brand Name	Irwin
Manufacturer Model No	IRW10507912
Type	Drill Bit Set
Set	Yes