This is a versatile diamond angle grinder grinding wheel. 50 gauge high carbon steel base, strong and flat with little shake. The high quality diamond tips, either single-row fan-shaped or double-row crossed design, are durable and long-lasting. Can easily and quickly grind all kinds of concrete, wall tiles, marble, granite and other stone, also can be used to grind asphalt. The 5 holes on the grinding wheel help to achieve the effect of heat dissipation and dust discharge, and improve the working efficiency. It is an indispensable helper for stone grinding.