The IRWIN bi-metal hole saws have been designed for the professional, and made to provide long lasting performance for use in general construction, electrical, plumbing, heating and ventilation, and remodeling 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 & the electron beam welded teeth give the user a stronger, longer lasting blade.

The IRWIN hole saw range is available from sizes 14mm (9/16 Inch) to 152mm (6 Inch), with a lineup of high quality arbors and a pilot drill to cover all your application requirements

Cuts a variety of materials including : Aluminium, Copper, Iron, Stainless Steel, Wood, Zinc

Size: 21mm dia