Wooden handles are almost, always wrapped with a grip. The grip comes in various thickness and surface contours. The grip makes it more comfortable and easier to hit a shot, giving some tactile feel. The grip also affects the final thickness (size), weight, and b/p of the racquet. However, some may have experienced an improvement in shot making or power with certain grips. This improvement could come from the grip itself- more about this later-its effect on the overall weight and b/p of the racquet. Many of you who are more advanced know that, to get power you must hold the handle loosely before impact gripping the handle when you hit the shot. This is technically called "leverage", and leverage at the hand/handle interface is greatly leveraged. To "enlarge" this "leverage" even more, you can actually look no further than the handle/grip. All you need is to get a foam-like material, say like a firm, external foam tape weather strip that is about 3mm thick, of a very high quality that can be compressed as you grip the handle when you smash or hit a shot, and then spring back to its original state. This 3mm "compression" is the source of that extra "leverage". You need to look at the racquet as a whole project to do this, not just as an add on foam tape strip. Its weight plus another grip should roughly be the same as the original state. The hard, foam tape strip must be able to withstand a service life of at least a year without any loss in elasticity. This will however make your grip bigger than original. A size G5 size with a flatter bevel is most suitable as the finished product can end up as a G4 or G3.