7+1-piece professional tile setter set consisting of 5 hole saws, 1 mounting plate, 1 centering drill, and 1 glass drill. The special cutting edges of the hole saws are coated with carbide grit. They are ideal for porcelain, ceramics, masonry, natural stone, drywall, and plastic. The precision carrier tube and the mounting plate are joined by brazing at high temperatures. The glass drill features a carbide plate with a special cross-cut for fast and precise drilling of glass, tiles, and porcelain.