Triumph TR2 TR3 TR3A Dzus Fastener Cast Metal T Handle & Boot Cover Tool, 650161
As fitted to; Triumph TR2 TR3 TR3A and Jaguar XK120 XK140 XK150 XK150 S E Type S1 3.8 as a lock key. Size; 5" (125mm) tall by 3 1/2" (63mm) wide, square taper from 7/32" (5mm) to 7/16" (10.5mm).