Professional-Holesaw-Set-3834-16-51-Sizes-16-51mm-Bahco-3834-SET-65-16-51-p-SANDFLEX-reg-bi-metal-holesaw-set-containing-popular-sizes-for-the-engineering-water-sanitation-and-electrical-installation-industries-p-p-The-holesaws-work-excellently-in-most-materials-such-as-wood-plastics-non-ferrous-and-ferrous-steel-including-stainless-steel-Their-knockout-holes-allow-easy-removal-of-cores-p-p-Holesaws-1-of-each-of-16mm-5-8in-20mm-25-32in-25mm-1in-32mm-1-1-4in-40m