Standard Length For the easy removal of most valve stem seals and lower valve spring guides in restricted areas above the cylinder head. Overall length: 250mm, 50mm reach. Extra Long For the easy removal of most valve stem seals in multi-valve engines in restricted areas above the cylinder head. Gripping serrations inside the jaws aid gripping the outside diameter of the valve stem seal. Steel pliers with double riveted metal handles. Overall length: 270mm, 80mm reach.