Zero Tolerance Wheel is designed for stock removal on granite and hard stone grinding away excess stone to prepare for polishing.Drum Wheel is used for polishing stone side after finishing Zero Tolerance Wheel.The bond of Zero Tolerance wheel is metal and bond of Drum Wheel is resin.
Zero Tolerance Wheels are excellent for heavy stock removal.They are available in a variety of size for any application,and different grits are also available for softer stones.The thread is standard