Style 1... Features fabricated structural steel construction in a strong, durable rail with push-pull adjustment. Individual foot pads provide under-rail clearance, accommodate span mounting and are often more adaptable to uneven surfaces.

Style 2... Features "Z" bar construction, pioneered by Overly Hautz, to provide inherent rigidity at moderate cost. They also incorporate push-pull adjustment and are ideally suited for most flat surface applications.

Type 1-R... Economical end-mounted rail aids installation where width availability is limited. Push-pull adjustment, only four mounting holes per pair.

Type 2-R and Type 3R... Typical variations developed for larger applications feature heavily structural members for strength and economy, plus push-pull adjustment.

Type 4-R... Special "offset" rail developed for a close-coupled vertical drive close to the side of the rail.

Type 5-R... Precision fabricated replacement rail which is lighter and stronger than its cast iron counterparts.