Item Type: CNC Spoilboard Surfacing Router Bit Material: Carbide Weight: 505 g / 17.8 oz(approx.) Package List 1 x CNC Spoilboard Surfacing Router Bit(10 accessories in total) 1RUSTPROOF BY PLASTIC SPRAYING: The cutter body is sprayed plastic, no rust and wear resisting. Effectively suppress vibration and improve vibration resistance 2NON KICKBACK: Blades are designed to resist backlash so your drill doesn't get out of balance, more stable 3APPLICABLE SCENE: Grooving head is suitable for flat, re leveling or planing the top surface of the baffle, can be trimmed and grooved 4COST SAVING: You will get 4 carbide inserts and 4 screws, when the cutting face becomes dull, the inserts can be rotated or replaced instead of replacing the whole drill 5LONG SERVICE LIFE: The industrial grade CNC woodworking head adopts 4 sided carbide inserts, all 4 cutting edges can be used, and the service life is several times that of ordinary milling cutters