Brand: Automotive Racing Products (ARP)
This special 6-point "star" socket is required for the head bolts on VW 1.8T 20V and Audi 2.7L V6 Biturbo engines. Fits OEM head bolts as well as ARP head bolts. Also fits the nuts included with ARP head stud kits for these engines. Fits any standard 3/8" square drive handle or wrench.
Note: For use with hand tools only. Using this socket with an impact driver will destroy it and could cause serious injury.