Show the forces which can be exerted during thermal expansion or contraction. Comprising of a heavy cast iron frame with slotted end pillars to carry a stout iron bar. The bar is threaded at one end for a large tensioning nut and has holes at the other end to accommodate the cast iron breaking bars.Supplied complete with ten breaking bars.Frame Dimensions: 340mm x 120mm x 100mmBreaking Bars are also available to purchase separately in a pack of 10 (B8R05987)