Features Premium Material Construction: Crafted from YG6 alloy and 45# carbon steel, this router bit offers exceptional strength and durability for all your woodworking projects Industrial-Grade Performance: Designed as a T-slot milling cutter head, it features fine cutting edges for high hardness and extended lifespan, ensuring precision in every cut Versatile Grooving and Trimming: The specially designed body is ideal for grooving and trimming wood, making it perfect for a variety of woodworking applications Compatible with Multiple Machines: Suitable for use in electric milling machines, engraving machines, and trimming machines, enhancing your workshop's capabilities Full-Length Shank Insertion: Ensure optimal performance by fully inserting the 1/4 shank router bit into the collet chuck, maximizing stability and cutting efficiency Features: 1、Made of YG6 alloy +45# carbon steel high-quality material, strong and 2、Industrial grade T-slot milling cutter head. The carbide tip has an of sharpn cutting edge, poss high hardn and long life 3、Solid hardened steel (45+hardn) body with backlash designs, poss high efficiency 4、Used on electric milling machine, engraving machine, trimming machine, CNC and other automatic milling machine. All drill shanks must be inserted full length into the collet 5、Used for wood slotting, trimming, practical and , saving both time and labor Specification: Item Type: 4-Flute Router Bit Material: Cutter head YG6 alloy, cutter body 45# carbon steel Color: Green black Uses: Used for wood slotting and trimming 4-Piece Set Specification: 6x40x1/4, 6x40x5/16, 6x40x3/8, 6x40x1/2 Size: 6x40x5/16: Approx. 40mm / 1.6in 8mm / 0.3in 46mm / 1.8in 6mm / 0.2in 6x40x3/8: Approx. 9.52mm / 0.4in 8mm / 0.3in 40mm / 1.6in 48mm / 1.9in 6mm / 0.2in 6x40x1/4: Approx. 6.35mm / 0.3in 8mm / 0.3in 40mm / 1.6in 45mm / 1.8in 6mm / 0.2in 6x40x1/2: Approx. 12.7mm / 0.5in 8mm / 0.3in 40mm / 1.6in 50.8mm / 2in 6mm / 0.2in Package List: 4 x 4-Flute Router Bit Package List 4 x 4-Flute Router Bit