1、Carbon Steel + Alloy: The milling cutter has a solids carbon steel body, an backlash resistant design and heat resistant. The blade is pointed and the bearing will not break. 2、Cutting All Kinds of Materials: Milling cutters are used to cut all kinds of materials, such as hardwood, softwood, synthetic boards, etc., but is necessary to avoid processing materials that are too hard. 3、Multiple Cutting Depths: The milling cutter can cut grooves of different depths with interchangeable bearings, and produce smooth cuts on both surfaces by replacing the bearings. 4、Wide Uses: DIY reliable milling cutters, which can be cut with specified notches in any art or craft woodworking project. 5、Basic Specifications: This is a milling cutter with a blade depth of 1/2in, a diameter of 1-3/8in, and a shank diameter of 1/4in. 1 x Milling Cutter1 x Bearing Set1 x Wrench2 x Storage Box Item Type: Rabbet Router BitMaterial: Main Body Carbon Steel + Bit AlloyShank diameter 1/4inDiameter of Cutter Head: 1-3/8inBlade Depth: 1/2in6 Bearings: 1/8in, 1/4in, 5/16in, 3/8in, 7/16in and 1/2in