Low Profile high strength steel spoke wrench easily works on different nipples to adjust spoke tension and true wheelset. Each wrench works on two different sizes of spoke nipples 13G (3.5mm)/Shimano® 4.3mm 14G (3.4mm)/15G (3.2mm) Mavic® M7/M9 DT T20/Campag 6.0mm Hardened Steel 5.3×3.8×2.3cm