Power-change holesaw and adaptor for a fast and safe attachment and release of the pilot drill bit and holesaw, with just one click. Progressive tooth strip provides optimal cutting performance and fast chip clearance. HSS bi-metal with 8% cobalt alloy, enlarged HSS stripe and redesigned teeth ensures extreme durability. Cuts Wood, Drywall, Plastics, Metal, Non-Ferrous Metal & Stainless Steel PowerChange Plus Arbor Steel Slotted Barrel to Aid Removal of Debris For Use with 3-Jaw Chuck Machines on Rotary Action Progressive Tooth Strip Cuts Wood, Drywall, Plastics, Metal, Non-Ferrous Metal & Stainless Steel PowerChange Plus Arbor Steel Slotted Barrel to Aid Removal of Debris For Use with 3-Jaw Chuck Machines on Rotary Action Progressive Tooth Strip