Porsche Zebra Double Box End Wrench 5/16 in x 3/8 in 0713305400 1681150810 Drive End External Diameter (D2):

Drive End External Diameter (D2): 27

This Matte Black Stability Control Switch for the 911 (10-13) Porsche car allows for easy and efficient control of the PASM and PSM features

so it is still a good idea to install relays to supply full voltage since voltage is commonly reduced at the switch contacts

and 930 (1976-1985)

Porsche Zebra Double Box End Wrench 5/16 in x 3/8 in 0713305400 1681150810 Drive End External Diameter (D2):Porsche Zebra Double Box End Wrench (5 16" x 3 8") The Zebra Double Box End Wrench (5 16" x 3 8") is a high quality tool designed for precision work with inch sized fasteners. Its POWERDRIV bi hex drive and 18 offset make it ideal for accessing and tightening fasteners in various applications. Specifications: Drive: Ring End POWERDRIV Bi Hex Sizes: 5 16" x 3 8" Material: Chromium Vanadium Steel Surface: Chrome Plated, Polished Rings Geometry: Ring End