This 3/8-inch drive hex bit socket set is designed for automotive repair, mechanical work, and Diy projects, making it ideal for removing and installing deep-seated screws and large bolts in tight spaces. Constructed from a combination of Chrome-Vanadium and S2 steel, the set offers exceptional strength and hardness. The included storage case features clearly printed size markings for quick identification. Compatible with both power drills and ratchet wrenches, the sockets feature precision-chamfered ends that ensure smooth insertion without damaging the workpiece. The set includes 11 metric sizes (3mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 12mm) and 9 Sae sizes (1/8"", 5/32"", 3/16"", 7/32"", 1/4"", 9/32"", 5/16"", 3/8"", 7/16""). Weight: 3.52 lbs.