Suitable for beginnersThe carbide cutting insert is compatible with most related accessories, it is easy to use whether it is a professional woodworker or a beginner, and it is very suitable for digging, carving curved surfaces and decorating certain details. Meets Multiple Needs Provides 4 different models of carbide insert to meet roughing and finishing cutting needs. Square (11 x 11 mm), diamond (10 x 28 mm), 2 types of round (12 x 2.5 mm and 8.9 x 2 mm). High quality materialThe carbide cutting blade is sharp and durable, not easy to break or deform, giving you a good long-term using experience. Maintenance TipsWhen wood lathe tools become dull and malfunction, there is no need to sharpen the knife, just rotate the head to get a fresh and clean edge for use keep on going. When all edges of the knife tip are dull, you can replace the blade with a new one. Reusable The round blade can be used 5-8 times, the square blade can be used 4 times, and the diamond blade can also be used 2 times.