Reams and smoothes 1/2, 3/4 and 1-inch thin-wall conduit ends to protect wire and permit correct installation of fittings * Reams both the inside and outside at the same time * Hooded-blade design keeps the tip from slipping out of screws, especially overhead * Compatible with: catalog no. 19352 and 85191 * Includes: two blades, two set screws, and one L-wrench