Strong tubular steel frame with sprung retractable 75mm diameter rubber tyred swivel castors.Castors provide easy mobility when unloaded, when body weight is applied castors retract and the step remains firmly in place on rubber feet.Slip resistant treads, with high visibility yellow clamps.Platform working area 400mm x 300mm.Tread W x D: 400 x 150mm.Made in UK.3 year guarantee.Choice of red or blue epoxy power coated finish.