Features： 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. Specification： Item Type: Rabbet Router Bit Material: Main Body Carbon Steel + Bit Alloy Shank diameter 1/4in Diameter of Cutter Head: 1-3/8in Blade Depth: 1/2in 6 Bearings: 1/8in, 1/4in, 5/16in, 3/8in, 7/16in and 1/2in Package List： 1 x Milling Cutter 1 x Bearing Set 1 x Wrench 2 x Storage Box