Cal-Van Tools Heavy Duty Three Legged Oil Filter Wrench features gear driven legs to grip and turn the tightest filters. It has been designed for use with 3/8 inch driver or a 3/4 inch hex wrench. The compact design allows for use in tight spaces. It removes filters from 2 3/8 inch to 3 3/4 inch (60 millimeter - 90 millimeter).