100mm Rhombus 340 Series 55kg Capacity Bolt Hole These versatile castors are smooth and quiet running. Strong pressed-steel bodies are zinc-plated for corrosion resistance. A wide range of round and square expanding plug fittings are available for Stem models (see table below). Swivel Plate, Stem and Bolt Hole models have a total-lock brake option. Used extensively: Hospitals, kitchens, garden centres and warehouses. Zinc-plated finish Rubber-tyred wheels Total-lock brakes available Grey, non-marking rubber tyred wheels