3M Safety-Walk™ Safety-Walk General Purpose Tread Rolls, 4" x 60 ft, Black (MMM19223) 1 Roll3M Safety Walk General Purpose Tread Rolls Certified by the National Floor Safety Institute (NFSI) as providing high traction. Use in heavy traffic work areas, ramps, walkways, loading docks, machinery, vehicles and aircraft. The rolls have a low profile design and their mineral coated, slip resistant material is highly durable. The rolls have pressure sensitive adhesive, covered by a removable protective liner. Global Product Type: Grip Tape Safety