Universal Spider Oil Filter Wrench - Minimum / maximum opening diameter: " 8 to " 13.5 cm. -Key made of tempered steel, providing greater durability and durability. -5 cm legs. high with grooves, preventing the filter from slipping. -It can be used with 3/8" inch wrenches (on the wrench itself) or with the included 1/2" inch adapter. -Ideal for use in small spaces, where the normal key cannot reach. -Article known as spider filter wrench, car filter wrench, universal filter wrench, 3-claw filter wrench.