Product description: This product is only for rough grinding at the factory, and you need to sharpen the blade by yourself. The sharpening head can be made of metallographic coarse sandpaper, which is used for all kinds of knives to replace the finest grindstones. It can not touch water and oil. It has a sharp effect on the blade edge and 20% of the metal surface is rust-proof and polished.Light.Features :1. The blade is finely polished and coated with dry anti-rust oil, which is durable.2. The blade of high carbon steel forged and heat-treated is hardened as a whole, and after a period of use, it will be sharp as new by grinding again.3. The handle is coated with iron core rivets, which is resistant to oil and corrosion, and has a non-slip design, which is light and strong, and is comfortable to hold.4. Special tools necessary for woodworking.Specifications:- Body material: Chrome vanadium steel, High carbon steel, Cast iron(Optional)- Head type: flat- Purpose: Woodworking- Bit width: 6mm, 12mm, 18mm, 24mm- Bit thickness: 4mm- Wooden handle length: 110mm/4.3''- Total length: 240mm/9.4''Package Included:4 x Wood Carving ChiselBlade sharpening knowledge: round knives first grind the inside and then the outside, and flat knives also grind the plane first, and then the bevel (back). Experts recommend that users try not to use machine sharpening, so as not to affect the quality of the blade.Precautions :1. Do not hit the chisel with a hard object horizontally to avoid breaking the chisel.2. The blade is sharp and it is not easy to work on steel.3. The blade is sharp, please ret