Fixed/Track crankset is the Profile Racing NoBoss cranks.  They are exactly the same as our Race Cranks, with the sole exception that they lack a boss to bolt a sprocket onto them. They require you to run a  Spline Drive Sprocket or Spider/Chainring. the Spline drive set up is a much more powerful drive rather than the bolted set up, so great for fixed riding. 

The crank kit comes with crank arms, a CrMo Gun Drilled Hollow 19mm 48 spline bottom bracket spindle, 6mm CrMo GDH Crank Bolts, and a Profile Crank Install tool.

Bottom Brackets are sold separately.