Gator Grip Universal Standard (SAE) and Metric 3/8-in Drive 6-point Socket SetGator Grip is a self adjusting universal socket with automatic standard and metric application Self adjusts from 1 4 in to 3 4 in standard and 7mm to 19 mm Gator Grip works in all shapes and sizes except a perfectly round head, just file an edge Works well on rusted and damaged heads Torque is over 100 lbs Works on a power drill (adapter is included) Made in the USA Features Sub Brand Universal Socket Finish Polished chrome Measure Type Standard (SAE)