Received ball grinder, next purchased a grinder attached the ball and turned it on.To my surprise the ball vibrated out of control. I compare the vibration to a drill bit when tighten out of sync. Next took it to a welder whom attached it to his new grinder which he experienced the same result. He felt the ball was poorly made thus out of balance. To say the least I will not order anything else from this company.
Disappointed New Customer