To operate the new Polydrive cylinder head bolts on VW / Audi engines. Optimal adjustment of the screwdriver bit
at this particular screw profile. The length of the insert allows the assembly of low-lying screws, even on older types of vehicles
usable as possibly replacing the original screws against Polydrive screws.
Size: M9 Length1: 130,0 mm Length 2: 168,0