Motion Pro 08-0511 Valve Stem Seal Install Tool Set Four common sizes for use on most modern street and off road motorcycles as well as ATVs Properly aligns valve stem seal to valve guide so seal snaps on straight every time Provides for quick and easy installation of valve stem seals on multi valve cylinders Slim profile allows easy access to valve guides even on modern compact heads with deep lifter bores Rounded tip will not damage inner lip of valve stem seal or valve guide bore