Angle grinder - Wikipedia
An angle grinder, also known as a side grinder or disc grinder, is a handheld power tool used . They are also common in machine shops, along with die grinders and bench grinders . Common disc sizes for angle grinders in the U.S.A. include 4, 4.5, 5, 6, 7, . File:Mechanical arm effects on portable grinder vibrations.webm.