Convenient adjusting screw and a hardened steel locking ring are two features that make these pipe jacks last for many years of use. Patented internal safety stop on the pipe jacks creates a 1” safety zone and prevents injuries to hands and fingers. JFV Folding Pipe Jack offers same great features plus legs fold for compact storage and easier portability. Roller head jack JH2R has extra wide bearing for great strength and tool life. Roller head jacks are preferred when circumstances call for the pipe to be turned for fabrication such as welding or roll grooving. Lower cost, v-head JHV is suitable for most ordinary pipe support needs. Adjusting screw gives proper working height. Outer surfaces are powder painted or zinc phosphate plated to resist corrosion. Ball transfer head JTA attaches to Ridgid ® and Sumner® models while all Reed heads and bases interchange with Sumner® and Greenlee®.