Whiteside Screw Type Helix Mortise Cutter w/Downshear, 1 in. CD is designed to create precise hinge mortises with ease. This versatile Helix Mortise Cutter can be used with either hand-held or 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 a 1/4" or 1/2" shank Helix Mortise Arbor (HMA14 or HMA12), which are sold separately. Equipped with a 2-wing carbide tipped cutter, it durability and long-lasting performance. Manufactured by Whiteside Machine Company in Claremont, North Carolina, this tool has a cutting diameter of 1 inch, a cutting length of 1/2 inch, and an overall length of 1/2 inch. Model Number: 13-1000