The Performance Tool W54045 3-1/2 In to 3-7/8 In Swivel Head Oil Filter Wrench is a specialty hand tool designed for removing and installing oil filters in vehicles. With a swivel head, this wrench allows for easy maneuvering in tight spaces, and its adjustable size range of 3-1/2 to 3-7/8 inches makes it versatile for various filter sizes. This single item tool is manufactured by Performance Tool, known for producing high-quality automotive tools.