The Mac Tools 15-PC. 3/8 Drive SAE and Metric Speed Allen Hex Bit Set (SXAB15B) is a high-quality socket set designed for automotive use. This set includes 15 pieces ranging in size from 3mm to 1/4 inch, offering both SAE and metric measurements. The hex/Allen drive type ensures a secure grip on nuts and bolts, while the chrome surface finish adds durability and corrosion resistance. With a 3/8 inch drive size, this set is compatible with a wide range of vehicles and provides the necessary tools for various automotive maintenance and repair tasks.