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. Cuts Wood, Drywall, Plastics, Metal, Non-Ferrous Metal & Stainless Steel Steel Slotted Barrel to Aid Removal of Debris 20mm - 64mm Dia. Holesaws For Use with 3-Jaw Chuck Machines on Rotary Action Powerchange Arbor & Pilot Included Fast Chip Clearance Cuts Wood, Drywall, Plastics, Metal, Non-Ferrous Metal & Stainless Steel Steel Slotted Barrel to Aid Removal of Debris 20mm - 64mm Dia. Holesaws For Use with 3-Jaw Chuck Machines on Rotary Action Powerchange Arbor & Pilot Included Fast Chip Clearance