Best string vibration dampener there is. Even if you don't use ektelon racquets. They go on and stay on. Stretch across the all the mains, so string vibration is gone. And they will work with multiple string formats.Tested this on two identical racquets, same tension in strings, same strings (use the second as back up when getting the first restrung). The vibration difference was not subtle! It was massive. You could even hear the difference.Have used head dampeners (which fall out easily), gamma worms (these are also good, just not as good 'cause they break) and even the rubber band trick (useless). These work and last forever. Sold my peers on it too once they played both racquets and felt the difference.They have an eyelet on the ends and your stringer can lace these in, but I typically just press them into place. The string friction holds them sufficiently.
Rating: [5 of 5 Stars!]