Park Tool Double Ended Spoke Wrench SW-12 Built with Mavic wheels with M7 nipples in mind, the Double Ended Spoke Wrench SW-12 from Park Tool is the ideal tool for adjusting spoke tension and alignment in those particular wheels.   Long-lasting and Well-Crafted Spoke Wrench Being manufactured by Park Tool, quality and longevity are assured thanks to the precision machined and plated construction of the tool. Vinyl dipped for a comfortable grip when in use, both ends of the wrench will efficiently get to work on your Mavic spokes. The smaller end is compatible with 7-spline nipples sized at 6.4mm outside spline diameter, as found on R-sys wheels. The larger head will fit 6-spline 9mm FORE drilled rim adapters, like those on rims such as Mavic XM819, EX823 and Speedcity wheels. Matching the size of the Mavic 108 471 01 wrench, the Double Ended Spoke Wrench SW-12 is a great alternative for the Park Tool die-hard.   Features:   Material: Forged Industrial Tool Steel     Head Fitting Sizes: Small End - 7-Spline, 6.4 mm, Large End - 6-Spline 9mm   Buy Park Tool Accessories from Chain Reaction Cycles, the World's Largest Online Bike Store.