Purchased to make changing tires on mini bikes easier. Without them, it's just an almost impossible task. They provide a lot of leverage and won't damage the bead (like a screwdriver or other inappropriate tool can do). A tip for fitting small tires (or big ones): when sliding the second bead onto the rim, use a vise clamped to the edge of the rim to keep the tire bead from unrolling (both sides), this makes the job very easy. a little soapy water or tire mounting grease in a spray can also help protect the bead and make mounting easier.