Features and Benefits:?Easy size reference: Bit and blades are engraved for quick and easy size identification?Longer bit life: Replaceable blades are made of hardened steelDesigned for heavy duty professional use, the switchblade 10 blade replacement kit includes 10 blades, two feed screws, two set screws, and a hex wrench. 2 in. 10 blade replacement kit comes with: (10) 2 in. Switchblade Selfeed bit blades, (2) feed screw, (2) set screws, and (1) hex wrench.