The housings of the element sizes DW-S 45 and 50 are made out of spheroidal cast iron, with inner square sections made out of steel tube. The inner square can be used for mounting "plug-in" lever arms on one or both sides.The installation of the element is achieved by bolting the two support flanges to the customer's machine parts. These elements have been specially constructed for transmitting alternating motions by passing the neutral axis in either direction. All metal parts are paint-finished.