Here are some good exercises to do to strengthen your fingers and hands for any type of hand strike such as eagle claw, tiger claw, dragon claw, etc.... The first one is doing finger tip push ups. The second one is doing push ups on your wrists. This will stregnthen your wrists which is important for snake stylist and doing spear hand strikes and such. Third exercise is striking a sand bag with a spear hand, when striking the bag vibrate your hand right as the hand makes contact with the bag. Fourth exercise is to do palm strikes on the bag, vibrating the palm when making contact. Remember it is always good to use a good dit da jow afterwards to help with any swelling or pain.