Heavy-duty, snap-off replacement blades (LB). Each blade is produced using OLFA's precise multi-step production process for amazing sharpness and superior edge retention. 8 cutting edges per blade strip. 10 pack features 80 cutting edges. NEW & IMPROVED - BLADE CONTAINER - LOCKS TO PREVENT UNNECESSARY SPILLING! Heavy-duty, snap-off replacement blades (LB). Replacement blades for 5003, 5004 and 9038.