From the Manufacturer...
The Roc is simply the best, most versatile mid-range disc ever made. It provides accuracy at any range. This disc can take and hold the angle of release, even into a headwind. It can be used for driving, upshots, straight shots, hyzer shots or anhyzers. The Roc ages gradually and predictably. If you’re not sure what disc to throw, choose the Roc; just like most pros.
Weight Range: Star: 170-180g, Pro: 150-180g, Glow: 165-180g, DX: 150-180g
Best Choice for: Experienced players utility disc, Hyzer shots, Anhyzer shots
Available Plastics: Star, Pro, Glow, DX