Special design: Three-jaw design tool makes work easier. Function:The Oil Filter Wrench Can be Adjust to remove Filters from 2-1/2 inch to 4.5 inch. Universal Application: Fits 1/2 and 3/8 inch Square Drive Ratchet or 7/8 inch wrench in all kinds of vehicles. Material:The oil Filter wrench is Made of 45# Carbon Steel. Never Rusty. High Quality:Two Upper And Lower Thickening plate, Firmly Holding the Gears, Long and Durable.