Keeper 4 inch x 17.5 inch Safety Step is perfect for replacing worn tread surfaces on running boards or for adding security to stairs in any location. The Safety Step is performance manufactured from EPDM rubber that resists damage from sunlight and ozone, so it remains intact longer than the original tread. A specially formulated adhesive makes the Keeper Safety Step easy to apply and ensures that it permanently adheres to wood, metal, fiberglass, concrete or any other clean surface.