1/2in spline socket set for SAE/METRIC with 12-corner design1、These drop-forged, heat-treated 12-point sockets are made of chromium vanadium steel (CR-V) with a mirror nickel coating for rust and corrosion resistance. 2、This 12-point socket kit includes 16 driver sockets of different sizes with knurled rings. It is an indispensable kit to extend the service life in daily garage, garden or workshop use. 3、The car socket kit is designed to improve strength, life and durability. The star-shaped tool set complies with ANSI standards. Highly polished to protect tools from harsh working environments. The open end has a non-slip function, easy to use, and can be used for damage Fasteners. 4、Versatility, instead of the traditional 4‑point, 6‑point and three‑sided sleeves, it can be used for fasteners of various sizes to meet your general needs. 5、It can provide twice the torque of standard fasteners to provide greater strength for your workload. Ideal for high torque applications, such as removing tamper-proof lug nuts, cylinder head bolts and other engine bolts.