Portable rail clamps are easily applied to rail head to prevent movement of crane wheels or other rolling stock. The clamp bodies are made of cast steel in two
size as follows: style" A" is for use with rails weighing 40 to 100 lbs. per yard and style "F" for 105 to 175 lbs. rails including all heavy crane rail sections.
Corresponding weights-42 and 50 lbs. each.