Our company has been making grinding wheels for 20 years, No matter in product quality or service is wonderful, In tests the product has performed as well as or surpassed many of the most recognizable brand names in the construction,Optimize your metal grinding work with these Win More 10 Pack Premium 5” Grinding Wheels for Cast Iron, Stainless Steel & Metal, at a 15-30-degree angle, to the work surface, applying the proper amount of pressure to allow the grinding wheel to do the work. For best results, consider not pushing too hard on the wheel, which can cause the grinder to stall or kick back or give a less efficient grinding action, while also increasing the chances of slippage or loss of control of the tool, resulting in injury or damage. Tips: please wear safety measures when using grinding wheels,Do not use a cut off wheel for grinding.