Wrenches are made of high-quality steel with a zinc-plated yoke and a blackened band for resistance to rust and corrosion;Plastisol-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;Unique yoke and link assembly allow a good grip, but will not crush the filter;Swivel tension is adjusted easily by using the nut and bolt on the handle