Self Feed Drill Bit Component, For Use With Switchblade Self-feed Bit, 2 9/16 in, Number of Blades 3, Hardened Steel, Includes (2) Set Screws, (3) Replacement Blades, Hex Key, Storage Case Keep 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.