Features: Wood Turning Lathe Tool Carbide Cutter Inserts Knives Set for woodworking Tools; The YG8 grade of carbide provides the best combination of the sharpness and durability,Polished to a mirror finish for smoother cutting and longer tool life. Perfect for Professional Carpenters and Beginners. Made of solid steel, providing you a better experience and durable use; It has good hardness, good wear resistant,high temperature oxidation resistant, good impact durability and low expansion coefficient. Specifications: Material:High Speed Steel Square 1: 11x11x2.0mmR50 Square 2: 11x11x2.0mm Diamond1: 10x28mmR8 Diamond2: 10x30mm Round 1: 8.9x1.85mm-30° Round 2: 12x2.5mm-30° Package Includes: 1x Square 11x11x2.0mmR50 1x Square 11x11x2.0mm 1x Diamond10x28mmR8 1x Diamond10x30mm 1x Round 8.9x1.85mm-30° 1x Round 12x2.5mm-30° 1x Wrench T15 note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.