Holesaw kit for cutting multi materials. HSS bi-metal construction with 8% cobalt alloy for extreme resilience and long life time. Progressive tooth strip for high cutting performance and fast chip clearance. Suitable for drilling holes in wood, drywall, plastics, metal, non-ferrous metal and stainless steel. Power change adaptor for fast and safe attachment and release of the pilot drill bit and holesaw with just one click.