I used it on the mini ball that came with the sharper image hoop to hang on the door, and also my Celtics basketball was also getting flat. Was difficult on larger ball but won't blame the pump, the ball is old and hasn't been touched in about 5 or 6 years. But it worked perfectly fine and the secret holder is very convenient and works well be careful when inserting and pulling out the needle not to snap or bend the needle. I didn't because I cautiously and mindfully used the object, I'm not careless with my elongings. Great product for the price. 👍