Luxilon Big Banger ALU Power Rough 125 is a playable tennis string designed for players who want more durability with amazing power and control and a rough texture for extra bite on the ball for superior spin potential. If you're looking for increased spin potential then you'll love playing with this string. It combines the spin enhancing attributes of polyester with a "dented" texture so you can achieve maximum spin and durability. All Big Banger Strings: Give more power. Are very durable. Show no loss of efficiency. Don't move. Are impervious to atmospheric conditions. Durability: 8 Power: 10 Control: 10 Comfort: 9 It is recommended by Luxilon that you string Big Banger strings at least with 10% less tension than your usual strings.