3M Safety-Walk Tread 7731 1 in x 60 ft x Heavy Duty Black3M Safety Walk Tapes and Treads are designed to provide traction on slippery surfaces where potential slips and falls can occur or where safety may be a concern. 3M Safety Walk Heavy Duty Tread is used for stairways, steps, ladders, and boat decks. Ideal for indoor and outdoor metal, wood and concrete surfaces, 3M Safety Walk Heavy Duty Tread is a great choice in anti slip protection.