The SHOCKWAVE 5/16 in. Insert Nut Driver Set is built to handle the most demanding fastening applications. Made from proprietary steel and heat-treated for maximum strength, these nut drivers are designed to resist wear and provide excellent torque transfer. The magnetic tips ensure a firm hold on fasteners, making work faster and easier. The 10-pack offers a convenient supply for professionals who require durable, long-lasting tools on the job site.