Historical
ANSI/OPEI B175.4-2018
Outdoor Power Equipment - Portable, Handheld, Internal Combustion Engine-Powered Cut-Off Machines - Safety and Environmental Requirements
Applies to portable, handheld, internal combustion engine-powered machines, which use a rotating cut-off (abrasive) wheel that is center-mounted on and driven by a spindle shaft, and designed for cutting construction materials such as asphalt, concrete, stone, and metal.
Outdoor Power Equipment Institute [opei]