Multi-function BladeThe carbide insert is designed to meet the requirements of roughing and precision machining, suitable as a replacement tool for spiral/spiral planer heads, rough wood turning tools, CNC milling cutters, ideal for hollowing out, chamfering, shaping curves and adding decorative details. Meet a variety of work needsFour types of knives are designed for different grinding effects, achieving clean cutting results. Square (11 x 11mm), Diamond (10 x 30mm), Round 2 types (12 x 2.5mm and 8.9 x 2mm). Sharp and DurableThe carbide wood turning gouges are all made of high quality solid tungsten steel to ensure strength and durability, and are polished to a mirror-like finish to provide smooth cutting and long-lasting performance. Best Choice for CarpentersThe carbide wood turning gouges and other related accessories are compatible, well-matched and easy to replace, making them the preferred accessory for woodturning enthusiasts and woodworkers. How to MaintainWhen the carbide lathe tool replacement insert becomes blunt or malfunctions, simply rotate the tip to get a new sharpness. You can even sharpen them for reuse, extending their lifespan. The round blade can be used 5-8 times, the square blade can be used 4 times, and the diamond blade can be used 2 times.