Wrench extender set designed for mechanics and hard-to-reach fasteners. It combines a 1/2 in drive switch and a 21 mm hex drive extension with a universal 13.5 in wrench extension. Compatibility and fit - Compatible with 1/2 inch drive or 21 mm hex drive - Includes a universal 13.5 inch extension for versatile use Key benefits - Increase leverage to make difficult fasteners easier to loosen - Reach tight or awkward areas without contorting your arms - For extra torque, attach a breaker bar to the opposite end What it offers - 1/2 inch drive or 21 mm hex drive compatibility - 13.5 inch extension length for extended reach - Simple, professional-grade accessory for automotive, industrial, and machinery work 2–3 practical use scenarios - Automotive engine work: reach bolts hidden behind components in crowded engine bays - Heavy equipment maintenance: access recessed fasteners in cramped machinery spaces - Machinery servicing: extend reach in tight spots and apply high torque when needed (breaker bar option) This description preserves the original product’s specs and purpose while presenting clear, customer-friendly benefits and applicable use cases.