1. Alloy blade, sharp and wear-resistant, sturdy and unsharpened 2. Double slots are suitable for metal, wood, plastic and other soft materials 3. Shank hexagonal design, clamping firm and stable, and effectively prevent slippage when grinding 4. Scope of application: for engraving/chamfering/cutting/grooving of metal, wood, plastic and other materials 5. Gear distribution: double groove 6. Material: alloy steel