Norton 21745 is a Metalite abrasive belt (R228) sized 4" x 24" with a grit rating of 100-X. It is designed for use with belt sanding equipment that accepts 4" x 24" belts and is part of Norton’s Metalite line. The 21745 designation identifies this specific belt within the series, ensuring a consistent abrasive surface for metalworking applications that specify a 100-X grit configuration.
