Upgrade your rooftop safety with the Fast Track 2x4 All-In-One System from On Top Safety—the only complete solution designed by roofers, for roofers. Built to meet and exceed ANSI and OSHA standards, this system combines unmatched strength, adjustability, and ease of use to streamline your jobsite safety setup. Its adaptable design mounts to nearly any edge—gravel stop, metal lock, reverse angle, or wood nailer—and features a heavy-duty post with 10 inches of adjustment for a secure fit every time. Proudly made in the USA, it’s the strongest post in the industry and the go-to system for professionals who demand both performance and protection.