SW rerailers are sold per unit, but must be used in pairs — a pair consists of one inside rerailer (SWA-IN) and one outside rerailer (SWA-OUT). The SWC Clamp is optional (used if the SW rerailer is clamped to the rail). Use one clamp per rerailer.
Rerailer for 85-100 lb rail. Fabricated from Ductile Alloy Lugs on Underside Prevents Sliding Past First Tie Can be Spiked to the Tie, or Clamped to the Rail Using the Optional SWC Wedge-type Locking System Easy to Install Designed to re-track all types of locomotives and rail cars smoothly and efficiently Used in pairs, right and left
NOTE: This unit is not recommended for multiple rerailments. A rerailment may cause stress points which may result in failure.