Feature Ideal for remove and install the valve spring with the cylinder head on or off the OHV and OHC petrol or diesel engines Quick removal and installation of the spring retaining keepers are then easily accomplished through the large openings on both sides of the compression tube It allows the removal of stem oil seals squarely and without damage to the springs Made of black-oxide plated steel and adopt high temperature Forged for greater durability, which can provide greater durability and maintains tool stability in every high-intensity job. Application Comaptible for Audi (4 and 5 cylinder) ,Comaptible for BMW Comaptible for Chevrolet Chrysler, Comaptible for Ford GMC Honda Hyundai Infiniti Lexus Lincoln Comaptible for Mazda Mitsubishi Nissan Porsche (924, 928), Comaptible for Saturn Toyota Volvo VW Volkswagen (4, 5, 6 cylinder) Comaptible for Most other engines with accessible valve springs. Valve pliers can reach down around the valve stem into the confined areas of the seal to grip it for removal or installation Precision machined seal driving adapters guide the seal for proper setting Knurled ends on the adapters, handles and sockets give you maximum grip in oily conditions Multi-point adjustable base of this tool bolts securely to the head while the adjustable lever mechanism pivots from the bar thus compressing the spring