1. Easy to Use Close the coil spring compressor until it touches the center rod, then insert the compressor into the coil spring. Compress the spring for removal or installation, and only release the compression once the spring is properly positioned for installation. The compressed spring contains significant stored energy and must be handled with care and decompressed cautiously. 2. Function: It includes 5 adapters of different sizes, suitable for various spring diameters on most cylinder heads. This allows you to correctly assemble the spring and makes the compressor easier to use. 3. Toolbox Storage Comes with 5 adapters for different spring diameters, ensuring a proper and secure fit for safe and easy compression. The 10 pieces are wellpackaged and organized in a box for convenient storage and transport. 4. CClamp Jaw: Strong and made from 1.7mm thick, heattreated steel with black oxide coating, resistant to bending and deformation during compression. Both ends of the Cclamp are aligned in a straight standard line, preventing slippage during use.