It's a Chuckit, you can't go wrong with this item.  If you haven't used one of these you are missing out!  I have a Malinois which means I have a dog with ENDLESS energy.  I simply can not throw a tennis ball far enough for long enough to tire this animal out.  Enter the Chuckit, and all is well in the universe again.  I can easily launch a tennis ball 50 yards with this tool with zero stress on my shoulder.  The dog and myself are very appreciative o of this item.