SAIT® 70921 Trimback™ Ceramic Flap Disc, Type 29, 4-1/2 in dia, 5/8 in - 11 Arbor, 36 grit, 12,200 Max rpm, 10 ea

Only the TrimBack™ line of flap discs are able to be trimmed to expose more abrasive overhang. Never trim beyond the maximum trim line (more than 1/4 in) or the ridged edge of the backing TrimBack™ plastic backing. Always mount a TrimBack™ flap disc on a properly guarded right angle grinder. To properly trim a TrimBack™ flap disc, apply the plastic backing to a secured metal workpiece while the grinder is running.