Whiteside Screw Type Helix Mortise Cutter w/Downshear, 5/8 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. The cutter includes 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. It is a 2-wing carbide tipped cutter made by Whiteside Machine Company in Claremont, North Carolina. The cutter specifications include a 5/8" cutting diameter, 5/8" cutting length, and 7/8" overall length, making it an excellent choice for precise woodworking tasks. Model Number: 13-625