Highly durable and offering superior strength, the Professional 150kg range of Extension Ladders are designed for heavy trade/commercial and tradesperson use. Punchlock® ‘D’ shaped rungs for secure footing. Industrial Duty Rated. Designed for use on industrial work sites where greater strength and safety is required. Interlocking stiles and swaged rung to stile joint for maximum resistance to twist and side sway. Patented convenient side pulley and rope extension system to keep rope away from the users’ feet. Anti-slip feet for added safety and stability. Extra Heavy Duty, 150kg load rating.