For narrow ladderways or openings where you don't have the right surface for a strike plate, Posi-Stop safety gates provide fall protection that meets OSHA, ANSI and Canadian COHS standards for weight limit and midrail, allowing you to protect employees even in hard-to-protect areas. A unique spring design provides a soft close, which limits noise and wear and tear, and the spring is guaranteed by a lifetime warranty. Adjustable design can cover openings from 11" to 15".