Whiteside Screw Type Helix Mortise Cutter w/Downshear, 1-1/8 in. CD is designed for precision hinge mortises, ing clean and splinter- cuts thanks to its innovative down shear cutting design. This versatile helix mortise cutter can be used with both hand-held and machine routers, making it suitable for a variety of woodworking applications. Featuring a 1/4-28 internal thread size, it requires either a 1/4" or 1/2" shank Helix Mortise Arbor (sold separately) for operation. The cutter is equipped with two carbide-tipped wings for durability and effective cutting performance. Manufactured by Whiteside Machine Company in Claremont, North Carolina, this tool ensures reliable quality and precision. The cutter specifications include a 1-1/8" cutting diameter, 1/2" cutting length, and 1/2" overall length, making it a addition to your woodworking toolkit. Model Number: 13-1125