The 83 series of half moon box end obstruction wrenches are specialized hand tools designed to access fasteners in tight or hard-to-reach spaces where standard wrenches can't operate effectively. Their unique angled or offset heads allow users to maneuver around obstacles such as pipes, walls, or machinery components, making them ideal for automotive, plumbing, and industrial applications. Forged from durable alloy steel, obstruction wrenches offer strength and corrosion resistance, ensuring long-term reliability. The compact design enhances precision and control, reducing the risk of damaging surrounding parts. By enabling efficient work in confined areas, obstruction wrenches save time, minimize frustration, and improve overall productivity for professionals and DIYers alike. Each wrench has two 12-point box ends and fits two different size metric fasteners for twice the coverage. This 5-piece obstruction wrench set includes the following metric (mm) sizes: 10x12mm, 11x13mm, 15x17mm, 16x18mm and 19x22mm.