Cover a range of capacities needed to service industrial tractors and other equipment. Jaws adjust to eleven positions for a range of 4-3/4” to 12-3/4”. No. 7307 has a 3/8” thick jaw. No. 7309 has a 3/4” thick jaw. No. 7308 comes with both a 3/8” and a
3/4” thick jaw.