OLFA Blades HB-5B Model are extra heavy duty snap-off replacement blades.
Each blade is produced using OLFA's precise multi-step production process for
amazing sharpness and superior edge retention. Easily handles cutting through
difficult materials such as drywall, roofing, leather, rubber, plywood, and
more. 7 cutting edges per blade strip. 5 pack features 35 cutting edges. For
cutters that will accept a HB blade-can be used in all OLFA's extra heavy-duty