6400 series extra heavy duty fiberglass step ladder. Meets or exceeds CSA Grade 1A, ANSI Type 1A. Durable non-conductive “C” Channel side rails in high visibility safety yellow. Super tough copolymer utility top for strength and durability. Slip-resistant serrated aluminum steps for safe climbing. Inside spreader arms complete with “wrap-around” brackets to strengthen spreader to rail connection and protect spreader arms during storage/loading/transport. Reinforced with Zinc coated steel diagonal braces on the front of every other step and double bracing on bottom step for added strength and stiffness. Full rear “L” horizontal struts reinforced with Zinc coated steel diagonal braces offer maximum rigidity. Extra large PVC rubber safety boots are heavy duty and provide increased rail protection and slip-resistance.