The Klein Tools Conduit-Fitting and Reaming Screwdriver can ream and smooth 1/2'' (13 mm), 3/4'' (19 mm), and 1'' (25 mm) thin-wall conduit. It features a hooded-blade design that keeps the screwdriver tip from slipping out of screws, which is especially handy when tightening hard-to-reach conduit fittings. This screwdriver has a longer Cushion-Grip handle for even more comfort and torque while reaming.PRODUCT FEATURES:- Hooded-blade design keeps tip from slipping out of screws, especially when tightening hard-to-reach conduit fittings; thicker hood is designed for rugged use- Reams and smooths 1/2-Inch (13 mm), 3/4-Inch (19 mm), and 1-Inch (25 mm) thin-wall conduit ends to protect wire and permit correct installation of fittings- Reams both the inside and outside of the conduit at the same time- Longer Cushion-Grip handle provides comfort and more torque for reaming- Replaceable reaming blade is now held in place with a 1/16-Inch hex socket set screw- Designed to be used on Electrical Metallic Tubing (EMT)