The 6104 Fiberglass 4ft Step Ladder has a duty rating of 300lb and features oversized, molded Proguard Boot™ for firm slip-resistant footing. These boots also protect the fiberglass rail. The HolsterTop® has the Lock-In System to keep your tools secure and right at your fingertips. The slip-resistant Traction-Tred® steps are double riveted and the rear section has a full set of horizontals. Back-up plates reinforce all top connectors and the internal spreaders are heavy duty. Fiberglass rails are non-conductive for working near electricity.