For the assembly and disassembly of valve keys on almost all 4-stroke engines. Operating instructions: To remove the valve, the spring and the inner guide sleeve must be taken out of the tool. Now, by applying pressure to the valve spring plate, the valve keys can be released. To install, reinsert the spring and the guide sleeve, position the valve keys in the valve spring plate, and then press the valve spring down with the tool. The keys will then be brought into the correct position. Art Article Version Engine service Features Valve key Area of application Disassembly tool, assembly tool Main color silver Secondary color red