The Dremel MM494BU pipe and 2 x 4 blade is made for cutting pipe and thick materials such as 2 x 4 studs. With an extra wide cutting edge, the MM494BU adds control and convenience because users can now easily cut PVC, conduit and copper pipe without the blade slipping off of the work-piece. Cuts through a 2 x 4 can now be done in one pass as well. The blade's Bi-Metal construction optimizes the MM494BU for metal cutting, so you'll experience no more destroyed teeth if you hit a nail while cutting. The Dual Interface allows its use with the most common oscillating tools in the market without the need of an adapter. Includes (3) MM494U 2-3/4 In. bi-metal/wood oscillating blades.