Swivoil Oil Filter Wrench (3-1/2" to 3-7/8"). Wrenches are made of high-quality steel with a zinc-plated yoke and a blackened band for resistance to rust and corrosion. The Plasticol-dipped handle will not slide off during use. Even hard-to-reach oil filters will come off easily with this swivel-handle oil filter wrench. The unique yoke and link assembly allows a good grip, but will not crush the filter. Wrenches swivel tension is adjusted easily by using the nut and bolt on the handle.