Bosch 5-Pack 3" 36 TPI Metal Blade is designed for very thin material, straight cuts in metal, non-ferrous metal, sheet metal, aluminum 1/64" - 3/64". For material thicknesses under 3/64" use a thin piece of scrap wood as backing. It fits Bosch models 1581AVS, 1581AVSK, 1584AVS, 1584AVSK, 1587AVS, 1587AVSK, 1587AVSP, as well as other older Bosch models.