Star-head socket. One end of the socket fits Steyrtek star-head bolts and nuts, and the other end fits a 17 or 19 mm spanner.

• Total length: 61 mm 
• 9-pointed star head
• Head diameter measured across the flats: 17 mm / 19 mm
• Head diameter measured across the edges: 19 mm
• Key diameter 12,5mm