For safer wooden walkways everywhere ... give your stairs, decks and ramps long-lasting grip. GripStrips provide safer footing and help prevent slips and falls. They are tough, durable, reusable and resistant to weather, pressure washing, shoveling and even salt - no peeling or ripping. Each GripStrip is pre-punched and slotted, there is no drilling required. As wood naturally swells with moisture and contracts as it dries, the slots are designed to accommodate this expansion. If you're not completely satisfied with your GripStrip, feel free to return the product for a full refund of the retail price within 90 days of purchase.