Multi-material high hardness alloy drill bit set.
Drill bits are made of hard, durable carbide and have a higher hardness than normal drill bits. Drill bit replaces two drill bits (1 glass & tile drill bit 1 manson drill bit ) for fastener holes in bathroom tile or wall mirror. Once you drill a tile or mirror, the drill can easily handle the masonry behind it. Function: The solid drill bit opening is neat, smooth, no shattered edges and less shaking, so the opening speed is fast, easy to remove shavings. When used properly, these drills will give you a wonderful, clean and accurate hole to keep them firmly in place.