Lot of 4 vintage obstruction/offset wrenches. Lot includes Mac S35 (3/4", 12 point), Snap On S8663 B (3/4", 12 point, Snap On M3502 (5/8", 12 point, has been ground some on top and bottom, NOT sides) and Snap On M4380 (3/4", 12 point, has been ground top, bottom and circumference). All are 1/2" drive. The Snap On M part number wrenches are for diesel service, what specific application I do not know.