The key can be used to lock the pulley on the crankshaft in the 2 and 4 valve engines operationg driven by the belt.

Application:

VW: 1.4, 1.6, 2.0I (Beetle, Bora,, Caddy, Golf, Lupo, Polo, Sharan, Touran, Transporter; Audi: A2, A3, A4, A6, TT SKODA: Fabia, Octabia,

Superb Engines: ADX, AEA, AEE, AEH, AEX, AFH, AFK, AGP, EGR, AHW, AJM, AKL, ALN, AMF, ANA, ANY, APE, APF, ARM, ATJ, AUA, AWH