Bosch sheet metal holesaws bosch 2608584804 this sheet metal holesaw from bosch has a power change adaptor which holds the pilot drill and fits into your drill chuck thus allowing fast fitting and changing of the range of holesaw sizes with just one clicksuitable for working in steel and cast iron stainless steel structural steel alloyed and unalloyed aluminium bronze copper pvc acrylic glass and wood bosch 2608584804 sheet metal holesaw 70mm