Wide Compatibility: end mill bits are compatible with most desktop CNC machines Maclix Carbide End Mill Set :Cutting Diameter: 3/8 inch，Shank Diameter:3/8 inch，Cutting Length:1 inch，Overall Length:2-1/2 inch Applicable metal materials:Designed for cCarbon steel/alloy steel/hardened steel/cast iron,etc Material: Made of micro grain carbide:Carbide has higher hardness and wear resistance and excellent cutting performance than high-speed steel Package Included: 2pcs 3/8" carbide square end Mill Maclix 2pcs 3/8 INCH Carbide End Mill Bits set