For adjusting valve clearance on twin cam models. Holds valve spring bucket down so adjusting shims can be removed. Manufactured from hardened alloy steel. Same design as the OEM tool. Replaces Suzuki tool 09916-64510 and Yamaha tool YM-04125. Fits all Suzuki four-stroke models with shim type valve tappets. Fits all Yamaha XJ600 Seca II models.