Model A Flag Type
A sturdy assembly of rail fit metallic chock with a combination extension handle and yellow indicator flat that extends beyond the side of the car which is easily visible for a distance.

Model A-1 Flag Type

Same as model A but modified for use on flush rails.

Model B Double-Chain Type

Model B has two chocks connected with strong chain welded to each block, making contact on both sides of the wheel tread; thus retarding travel in each direction. Handles provided.

Model B-1 Double-Chain type

Same as model B but modified for use on flush rails.

1. Wheel Chocks are designed for use on standard railroad tee rail and for standard U.S. rail car wheels - 33" to 36" dia. Do not use on smaller wheels, on overhead rails, or on rail heavier than 140 lbs./yds.
2. Railcar must be at a complete stop before chock is placed against wheel. Do not attempt to stop a moving car with a wheel chock.
3. Grippers are important in holding chock securely. Keep grippers sharp by turning to new edge and replace when worn. A dull-edged gripper will cause chock to slide. Anchor grippers securely with a peening hammer. If gripper is missing, chock will slide.
4. On grades, chocks may slip.