49-22-5100 Milwaukee 5 Piece Switchblade Plumbers Kit Our best Switchblade assortment for the professional plumber, the 5 Piece Switchblade Plumbers Kit contains 4 of the most common selfeed bit sizes, 4 feed screws, 4 set screws, 4 replacement blades, and a 5-1/2" x 7/16" Universal Quik-Lok Extension. The durable, compact carrying case makes it easy to transport from one location to the next. Removable storage case included.  Features: Aggressive feed screw design allows the bit to pull through the wood faster, resulting in faster drilling.Replacement blades made with hardened steel increases bit life.Size and model number engraved on each bit.Compact carrying case with handle.