- Ironton Hole Saw Set - 16-Pc. Carbon steel with black finish Variable pitch teeth for smooth cutting Works on drywall, wood, plaster Designed for plumbers and electricians Blade sizes: 3/4in., 7/8in., 1 1/8in., 1 1/4in., 1 1/2in., 1 3/4in., 2in., 2 1/2in., 3in., 3 1/2in., 4in., 5in. diameter