Sometimes drummers need a bit more grip on their sticks, but don't want to use tape that gums up over time, or buy sticks that have grips that they don't like or aren't used too. The DynaGrips gp on most 5A, 3D and 8A sticks. You can just take them off when you break a stick, or wear them down. Buy one set and use them for a long time.
It's a simple way to keep your grip on your sticks.