The Profile Racing Chrome Moly Race Crankset(RHD) is everything you need to run Profile cranks except the bottom bracket (which is sold seperately).
Right hand crank arm has sprocket boss.
RHD crankset includes crank arms, 19mm GDH heat-treated CrMo axle, GDH crank bolts, flush washers, sprocket bolt, and crank installation/removal tool.
Guide for 19mm axle lenghts:
-5.625"(for Mid,American,Spanish,and internal Euro BB's)