All about tennis string savers (What Federer uses on the strings) - YouTube
A Complete Guide On Tennis String Savers - Improves
Jonathan on Twitter: "The best thing about the Federer Google Glass vid is seeing he still uses 19x16 string pattern + 10 string savers - http://t.co/18IgXourQA" / Twitter
String Savers: Another Piece of the Puzzle in Roger Federer's Racquet Setup - peRFect Tennis
String Savers | Racquet Quest
Unorthodox Stringing: StringSavers with Used/Worn Poly Works!!!