preferably the jack kramer staff or the dunlop maxply fort. other rackets will be considered as well. grip size must be from 3-4L (4 3/8 - 4 1/2). the rackets will be used to teach tennis to beginners as well as some advanced students who never used a standard sized wood racket before. the whole idea is to add a little bit of precision and accuracy to their strokes and focus more on the ball. watching the old tennis matches just rung a bell with me especially when i see these teenagers who are just starting try to emulate the pros of today. WRONG!!! so let me know if you guys want to part ways with it.