MEX is a hexagonal allen key available in 4mm, 5mm and 6mm lengths. Laser etched along the edge is a 110mm ruler scale for measuring and adjusting the height of a saddle, checking bolt depths, or for anything small.
Dimensions: 145mm (4mm), 165mm (5mm), 185mm (6mm)
Weight: 17.5g (4mm), 31g (5mm), 50g (6mm)
Material: Chrome molybdenum
Made in Japan