Durable Material: The 3 jaw bearing puller is made of premium 45 carbon steel material; Its durable features allows you to use it for a long time Heat Treatment: This 3-jaw pilot reversible bearing puller has been heat treated to give it a higher hardness Reversible Jaw Design: The inner bearing extractor features a reversible jaw design, which is suitable for internal/external pulling applications Easy to Use: The pilot bearing puller is easy to use; Gently turning the small wrench can produce a strong pull force Wide Application: The internal/external pulling tool is mainly used for the removal of gear, bearing, bushing and more