This automatic twist-lock steel carabiner is a spring loaded keeper used as anchorage connector. It has a 1-Inch gate opening and is plated to resist rust and corrosion. Made of forged alloy steel and zinc dichromate plated. Meets or exceeds OSHA 1926.502, ANSI Z359-2007 and CSA Z259.12 requirements. ANSI Z359-2007 compliant for connectors which meet the 3600-Pound gate requirement. Recommended for industrial use, construction, steel and metals. Measures 7-Inch length by 3-1/2-Inch width by 2-Inch height.