The ALU Power Rough 125 is a rougher version of ALU Power 125 for increased spin potential. The dented surface also provides more string flex for a slightly softer and more forgiving feel. It is the exact same Poly-Ether-Ether + Aluminum performance enhancing formulation as in ALU Power 125. Used by many players as a hybrid with natural gut including Roger Federer and other Top 10 players.