This filter wrench is an essential tool for any mechanic or engineer working on a wide range of oil filters. The wrench is self-adjusting, with a three-arm system that can remove all types of oil filters from sizes 63.5mm to 101mm in diameter. The wrench is provided with 1/2"D, 3/8" D, and 21mm hex head adjustment options for greater versatility and usage. Features and Benefits Three-arm filter wrench, fits oil filters ranging in sizes from 63.5 - 101mm diameter Removes and tightens with two-way system that turns clockwise and anti-clockwise for versatility Can be tightened using either a 21mm socket or a spanner Legs manufactured from hardened Chrome Steel for durability and extra strength during usage Typical Applications Designed to remove or tighten a range of oil filter sizes on cars and commercial vehicles