21Pcs Lathe Threading Tools - 7pcs Chuck Bar Holders + 7pcs Carbide Insert Lathe Turning Tools + 7pcs Wrenches. Model: SCLCR1212H09, SCLCL1212H09, SDNCN1212H11, SDJCR1212H11, MGHER1212-2, SER1212H16, STGCR1212H11 High Performance - High clamping force, high impact resistance. Good toughness and hardness, long . Material The lathe tool holder is made of high quality steel, which is more durable, moisture-proof and dust-proof than traditional lathe tools. Easy operation - Quick and easy clamping and turning mode, only one wrench is needed to complete the blade and adjustment washer. Application - Very suitable for turning bowls, sleeves, plugs, small parts or dovetail rafters, etc. Carbide tools make rough machining easier and reduce physical wear.