Amana tool 56270 Carbide Tipped Mortising Screw Cutter 1/4 Dia x 1/2 Inch Cut Height x 1/4 - 28 Thread

Carbide Tipped*, 2 Flute * Item no. RC-55248 utilizes a insert solid carbide knife. Arbors sold seperate. Designed for use in standard lock mortising tools, these cutters can also be used in a standard router if mounted on a separate arbor.   For 1/4" shank use arbor #47611. For 1/2" shank use arbor #47614. #55255 uses arbor #47616. View all available Threaded Arbors for Screw Type Mortising Cutters. Please note that these are the cutters only! The tools do not include the arbors.