Lever Action Overhead Valve Spring Compressor - PKTool The PKTool Lever Action Overhead Valve Spring Compressor offers efficient compression of valve springs, facilitating easy removal of springs, seals, and retainers. Its universal design is compatible with a wide range of OHV, OHC, and CHV engines, allowing replacement of valve springs and valve stem oil seals without removing the cylinder head. Designed with a cam action lever for secure spring locking, the tool features adjustable spring depth to grip retainers of various sizes. A reversible jaw adaptor and automatic cam action ensure a secure fit, locking into a predetermined setting for reliable operation. Please note, while versatile, this tool may not be suitable for engines with deeply seated valves. Additionally, it can be utilized for removing battery terminals, adding to its functionality in automotive maintenance tasks.