The tool is made of alloy steel, which is more sturdy than similar products. One special tool per vehicle ，can be used permanently.Equivalent to OEM T40347. The Piston Ring Compressor tool T40347 is necessary for reliably installing the piston in the cylinder head.Suitable for Volkswagen Audi EA888 Skoda 1.8T 2.0T engine，Audi A4 2016> 4Cylinder direct injection 2.0 l 4V TFSI (Generation III）. ).