Another site that is far from complete and to which additional information will be added. March 202
Below is shown Item# 5010 ‘Black Steel Pipe Grips‘ available 1909 -1959+. Not listed in 1965. In 1959 they are called ‘Footprint Pipe Grips‘. Always available in sizes from 6″ to 16″ and having jaws that could be adjusted in depth by moving the holding bolt through 3 different holes in the sliding jaws. The same image was used throughout the 5o+ years of its’ existence!