This Lochinvar tool is a Wrench Element (SI). It is specifically designed for the installation and removal of heating elements in water heaters. The wrench element is constructed from durable, high-quality steel to ensure longevity and reliability during use. Its unique design allows it to fit perfectly onto the heating elements, providing a secure grip for efficient installation or removal. The tool's size corresponds to the industry standard for heating elements, making it compatible with most models. This Lochinvar Wrench Element (SI) is an essential tool for professionals in the plumbing and HVAC industries.