This racquet is cheap. That means it worked for what I needed it for. If you need to poke a few holes in a bottle or similar and don't want to pay $12 for something that will last, this helps. The part of the bit where the cartridge is clamped is hollow and not very strong. I think mine was just a hair off center but like I said it did the job and I think it probably won't puncture more than half a dozen more holes before it becomes garbage.