-Manufactured from 2mm thick galvanised steel-Bolt hole to suit M12 fixing, nail holes 4mm diameter -Use 30 x 3.75mm sheradised square twisted nails in all pre-punched holes, together with bolts in Multi Truss Hanger range where required-Bearing surface on all multi-truss hangers is 75mm-Produced from galvanised steel to BS EN 10346:2009 + G275 as standard