The most advanced ergonomic profiles for health professionals. One of our most common questions is, which is better- the M2 or M3. Well they are booth excellent. The M2 has perfect symmetry when switching between traditional and large radius edges. The M3 has a more aggressive traditional edge with tissue reliefs. If you see yourself using the LRE's more often for deep fascial release (like I do) go with the M2. If you practice traditional IASTM technique the M3 is the top of the line.