This 21mm impact socket from Neilsen is designed for heavy-duty use with 3/8-inch drive impact wrenches. Made from Chrome-Molybdenum steel, it features a 12-point design for enhanced grip and compatibility with hub bolts and other heavy-duty fasteners. Neilsen provides professional service, product support, and a VAT invoice with every order. They also offer 60-day returns for unused items and standard/express delivery options.