Features 1、YG6 alloy +45# carbon steel high quality material, strong and durable. 2、Industrial grade T‑slot milling cutter head. Fine cutting edges, high hardness and long life. 3、Steel (45+ hardness) body, special designed for grooving and trimming of wood 4、Used in electric milling machine, engraving machine, trimming machine, 5、Suitable for CNC and other automatic milling machines.The shank of all drill bits must be inserted full length into the collet chuck. Specification Condition: 100% Brand New Item Type: Router Bit Material: Cutter head YG6 alloy, cutter body 45# carbon steel Color: Dark green Purpose: Used for wood slotting and trimming 4pcs / set Specification: 1/4 x 40 x 1/4 1/4 x 40 x 5/16 1/4 x 40 x 3/8 1/4 x 40 x 1/2 Package List 4 x Router Bit