Motion Pro - Valve Stem Seal Install Tool SetProperly aligns valve stem seal to valve guide so seal snaps on straight on multi valve cylinders. Contoured design in bottom of handle cradles and protects the delicate inner lip of the valve stem seal while directing tool force to the sturdy outer rim. Rounded tip will not damage inner lip of valve stem seal or valve guide bore. Slim profile allows easy access to valve guides even on modern compact heads with deep lifter boxes. Specifications Four