Description: Metal MaterialCrafted from forged carbon steel, the C-clamp and other components are heat treated and coated with black oxide, ensuring they withstand the pressure of compressed springsEasy to OperateThis tool set allows you to safely compress valve springs or handle cylinder heads during the removal and installation process for most cars, motorcycles, or other small enginesConvenient Storage and TransportThe reinforced blow molded case keeps all items organized, making it easy to carry around and store neatly when not in useProfessional Tool10PCS VALVE OVERHEAD CLAMP SET, professional auto repair tool set combination10 Pieces Valve Spring SetThis clamp set includes a wide C clamp, 3 extension rods , 5 collet adapters (16mm 19mm 23mm 25mm 30mm), and a hand lever Package Includes: 1 Spring Clamp Tool Kit Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.