The Clack WS1 Disassembly tool is like a Swiss Army knife in that it has multiple uses but I should mention that it is not the only way you will be able to disassemble a Clack water softener valve, it just makes the whole process easier. This tool is most useful for removing: • Drive Cap Assembly • Injector cap • Meter Assembly • Tail Kit • Bypass Very handy tool to use, I carry mine with me whenever I am in the field.