Nolan Derail: Sliding - Bidrectional, Low Profile: SD-6

Double End Derail, Sliding “ Bidirectional, Rail Size 6-5/8" To 7-7/16" (112-141 lb. Rail) Longer Design: A longer derail block allows for a decreased deflection angle, which increases the functionality of the derail. Flexibility: Nolans sliding derails come in two sizes, SD-3 and SD-4, which cover rail sizes 80 lb to 141 lb. Easy Installation: The derails horizontal base plate is integrated with the derail housing, and this ensures a perfectly aligned derail, eliminating adzing and shimming of the ties. This unique base design requires no tie strapping or rail braces on the field side of the rails. The derail becomes a fixed part of the track. Security: Can be padlocked to the rail head on or off the rail to ensure visibility, safety, and security. Features: Fabricated from Carbon Steel Will Derail All Rolling Stock including 6 Axle Mainline Locomotives Sits only 2-3/4'' (69.85 mm) Above the Top of Rail Unique Design Eliminates Tie Strapping or Rail Braces on the Field Side of Rails