The Milwaukee SHOCKWAVE™conduit reaming bit holder is engineered to deliver the most reams and be the longest reaching accessory reamer in the industry. Its dual purpose design allows users to ream the inside and outside of the pipe burr-free as well as fasten with a single accessory. Made for use with 1/2 In., 3/4 In. and 1 In. EMT, the thick, hardened tool steel blade provides up to 5X life vs. the competition. The slim profile allows access for common electrical fastening applications. The SHOCKWAVE™ conduit reaming bit holder features replaceable blades (48-32-2351) for extended life.