Whiteside Screw Type Helix Mortise Cutter w/Downshear, 9/16 in. CD is designed to create precise hinge mortises with ease. This versatile cutter can be used in both hand-held and machine routers, featuring a down shear cutting design that ensures clean, splinter- cuts every time. It has a 1/4-28 internal thread size and requires either a 1/4" or 1/2" shank Helix Mortise Arbor (HMA14 or HMA12), which are sold separately. The cutter is equipped with two carbide-tipped wings for durability and efficient cutting. Manufactured by Whiteside Machine Company in Claremont, North Carolina, this tool a cutting diameter of 9/16" (.562"), a cutting length of 5/8", and an overall length of 7/8". Model Number: 13-562