Features and Benefits:?Replacement blades made with hardened steel increases bit life?Size engraved on each blade?Storage case with built in hex wrench carries up to 5 bladesKeep all the tools to change your SwitchBlade in this handy, self-contained storage case. The SwitchBlade replacement kit includes three replacement blades, one feed screw, two set screws, and an integrated hex wrench. The replacement blades are made with hardened steel to increase bit life. The size is engraved on each blade.