Polymak Grinding Wheel 7Inch 180mm DC180 Diamond Cut High Performance Abrasive Disc for Concrete, Masonry, Stone, Construction, Surface Preparation & Heavy Duty Grinding Applications Jeweled Movement Indicator Its ratchet stop mechanism ensures Its ratchet stop mechanism ensures consistent measuring force Non Damaging Grip: Precision machined with close wrench opening tolerances to provide a secure grip on nuts without causing rounding or damage Machine Compatibility: Compatible 7 inch 180mm grinding machines Diamond abrasive technology provides effective material removal and is particularly useful when working on hard and abrasive surfaces where conventional grinding abrasives may wear more quickly