Progressive tooth strip for high-cutting performance & fast chip clearance Slot Design easy plug removal Durable Carbon Steel wear-resistant, rust-proof, durable Installation The hole saw connecting rod structure is simple, easy to disassemble and assemble, has strong stability, and good concentricity, extending the service life. Efficient Cutting Super sharp saw teeth have been designed to cut faster, so no material gets stuck making work faster and better finished Wide Application Suitable for softwood, plywood, plastic plate, plasterboard, and thin PVC board, Great tasks of cutting multiple hole sizes from small to large in desk surfaces, doors, and furniture