The SwitchBlade replacement feed screw kit comes with 5 feed screws, 3 set screws, and a hex wrench. Size and model number are engraved on each bit. Aggressive feed screw design allows the bit to pull through the wood faster, resulting in faster drilling. Replacement blades are made with hardened steel to increase bit life. Self-contained storage case keepseverything together within easy reach. Will fit in a pocket or tool belt.