With the Hikoki 752174 hole saw set, you cut clean and accurate circular openings across wood, drywall, plastics, aluminium, copper, and stainless steel. This comprehensive 16-piece combination set includes thirteen bi-metal hole saws ranging from 19 to 76 mm, ensuring you have the right diameter ready for installing junction boxes, pipes, and wiring conduits. Built with durable hss bi-metal teeth, each hole saw delivers smooth cutting action and long service life. The two supplied mounting arbors with pilot drill bits and an adapter keep your work centered and prevent slipping during startup. Everything stays neatly organized and protected on the job inside the sturdy plastic carry case.