1. The blade is finely polished and coated with dry anti-rust oil, which is durable; 2. The high carbon steel forged and heat-treated blade is hardened as a whole, and it can be sharpened as new after being used for a period of time. Comfortable to hold; 4. Special tools necessary for woodworking Product This product is only rough ground when it leaves the factory, and you need to sharpen the blade by yourself. The sharpening head can use metallographic coarse sandpaper, which can be used for all kinds of knives to replace the finest grinding stones. 1. Do not hit the chisel horizontally with a hard object, so as not to break the chisel. 2. The blade is sharp, and it is not easy to work on steel. 3. The blade is sharp, please put it away safely after use, so as not to hurt others. Quantity delivered: 4 pieces Size: length 24cm, width 6mm, 12mm, 18mm, 24mm Color: as pictured