- Material: 45# carbon steel for excellent wear resistance and durability, delivering long service life. - Adjustable diameter: loosen the nut to set the working diameter, compatible with the inner rocker arm of most models. - Strong bite: features a special U-shaped tooth structure that provides a secure grip during disassembly and installation of the inner rocker arm. - Slim profile: only 20 mm thick, designed for use in tight spaces. - Easy to use: simple setup with a few turns to adjust, then place and secure for efficient work. - Use scenarios: - Servicing engines in tight engine bays where space is limited, such as passenger cars or compact trucks. - Performing inner rocker arm disassembly or installation across different model years and configurations with a single tool. - Fleet maintenance or professional repair shops that benefit from a durable, versatile tool reduces the need for multiple tools. - Compatibility and performance: combines versatile diameter adjustment with a robust bite and slim design to support reliable, efficient valve train maintenance.