Two 3/8 inch pneumatic drills, air drills. One is a St. Louis pneumatics model SLP - 34125, 3100 rpm. The other is a master power model 1487-99, 3200 RPM. Both have Jacobs three eights capacity chucks. Both were tested and seem to work fine they seem to have good torque. I do not know anything about these other than that. I bought them at an auction with a bunch of other air tools