MEX is a hexagonal allen key from Runwell, Japan. 4mm, 5mm and 6mm allen key with a 110mm ruler scale for measuring and adjusting the height of a saddle. Made from Cro-Moly steel for superior strength and durability.
L145mm (4mm), L165mm (5mm), L185mm (6mm)
17.5g (4mm), 31g (5mm), 50g (6mm)
Made in Japan