• Carbon steel, hardened lead screws and cast jaws with safety hooks to prevent accidental release of spring under compression.• Maximum load per set of three clamps 1200kg.Spring not included.Carbon steel, hardened lead screws and cast jaws with safety hooks to prevent accidental release of spring under compression. Maximum load per set of three clamps 1200kg.• Carbon steel, hardened lead screws and cast jaws with safety hooks to prevent accidental release of spring under compression. • Maximum load per set of three clamps 1200kg. • Model No. AK384Technical Specification:Nett Weight: 2.73kgDrive: 1/2"SqMaximum Jaw Opening: 235mmDimensions: Length: 100mm x Height: 45mmWeight: 2.8KgWarranty: 1 year