ORIGINAL valve spring compressor. Beware of fake, cheap, and low quality copies. We (EuroExportInc.) are the original creators and manufacturers of the tool. The copies contain cheap parts, especially bolts that are NOT long lasting/durable. Installing valve springs has never been easier. With the help of this tool, it only takes a matter of seconds to remove or install the valves spring assembly in your vehicle. The body is anodized CNC machined 6061 T6 aluminum, for a gorgeous finish and excellent durability. The entire product is made from start to finish in the US. You can use this tool with the head on the block. Kit includes: ---Billet valve spring compressor body tool anodized (to prevent corrosion) ---Magnetic screw driver ---Main bolt ---Retainer cap ---Bolts ---Instructions ---Lubricant Applications: Ford 4.6L 4V and 5.