The Tolsen 16527 is a 27mm socket designed for use with 1/2" square drive tools such as ratchets, breaker bars, and torque wrenches. It is crafted from heat-treated 50BV30 Chrome Vanadium steel and features a polished, chrome-plated finish that helps protect the tool from corrosion during regular use. To ensure a secure fit, the socket includes a ball retaining groove that keeps it firmly attached to the drive tool. Its improved head profile is specifically engineered to grip deformed fasteners, making it a reliable choice for mechanics or DIY enthusiasts tackling stubborn bolts in automotive or industrial repairs.