Milwaukee's Shockwave range of power tool accessories feature 1/4" hex shanks and are impact rated, meaning they can be used in impact drivers as well as standard drill drivers. Shockwave impact duty hole saws have an 8% cobalt construction for durability, and feature ejection springs for automatic release of the core once the hole is drilled out. These hole saws are ideal for use on metal and plastics. Specifications • Diameter: 25mm Features and Benefits • Optimised for use with cordless machines • 8 teeth per inch for smooth, burr-free holes • Thin wall construction for minimal resistance • Shallow cup optimised for drilling thin metal • 1/4" hex shank for direct insertion into impact drivers • Stop shoulder prevents over-drilling • 8% cobalt for best durability and lifetime • Ejection spring auto ejects slug