Material: high-grade carbide maximum strength and durable. industrial quality straight router bits, high precision,smooth cutting. Durable: premium carbide blades for a sharper and longer lasting edge.silver induction brazing for maximum strength and durability. 3 Different Sizes: kit contains 4 different slot sizes, 3/4/5mm trim router bit. variety of options for your needs. Good for slotting a wide range of materials: including density board, solid wood, mdf, chipboard, plywood, etc. Grooving Cutter: is committed to providing absolutely high quality, high precision craftsmanship for the entire product range.if you have any question about product, please feel free to contact us. Product Description Product Description Grooving Cutter Specifications. Housing Material: Solid Hardened Steel. Housing Material Blade: Industrial Grade Microcrystalline Carbide. Grooving Shank: 8mm. Cutting Depth: 12mm. Cutting Diameters: 3mm, 4mm, 5mm. Cutters Slotting Cutters Application: For Grooving, Deburring And Cutting. Scope of delivery: 3 x Set of straight cutters Tip: 1. Please Reduce The Speed And Feed Rate Of The Machine Appropriately To Avoid Damage To The Blades By Excessive Speed. 2. It is recommended not to cut too hard wood to avoid incomplete cuts. 3. It is recommended not to use glue to cut laminates, glue will blacken the blade and affect its use.