The E7410 Extension Trestle 10' Ladders has a 300 pound duty rating per side and is designed for one or two-person jobs. The slip-resistant TRACTION-TRED® extra wide steps are knee-braced and double riveted. A spring-loaded locking mechanism makes maneuvering the extension trestle easy. The nylon-coated guide sleeves assure minimum friction and wear and also increase the ease of operation. External rail shields and the EDGE® bracing system help protect the rails. Fiberglass rails are non-conductive for working near electricity.