The 5-Piece SwitchBlade™;;; Bit Plumber's Kit offers an assortment of the Milwaukee® SwitchBlade™;;; Selfeed Bits commonly used on jobsites. Milwaukee SwitchBlade Selfeed Bits are designed for any trade that demands repetitive cutting of large holes in wood. SwitchBlade bits allow you to remove and replace blades rather than resharpen. You get a new bit with every quick, convenient change of the hardened steel blade. An aggressive feed screw design enables the bit to pull through quickly for faster drilling. The kit includes bits in diameters 1-3/8", 1-1/2", 2-1/8", and 2-9/16". Also included are 4 replacement blades, 4 feed screws, 4 set screws, a 5-1/2" Quik-Lok® extension and a hex key, all in an impact resistant carrying case.