The IRWIN bi-metal holesaws have been designed for the professional and made to provide long-lasting performance for use in general construction electrical installation plumbing heating and ventilation and remodelling applications The sharp variable tooth 4-6 pitch design provides a faster cutting action and enhanced performance in a variety of materials and cutting applications The bi-metal construction and the electron beam welded teeth give the user a stronger longer-lasting blade The IRWIN holesaw range is available from sizes 14 mm 916in to 152 mm 6in with a line up of high-quality arbors and a pilot drill to cover all application requirements Cuts a variety of materials including aluminium copper iron stainless steel wood and zinc