Apex 9 pc 1/2 Deep SAE Impact Socket Set SAE Sizes - 3/4, 11/16, 5/8, 9/16, 1/2, 7/16, 5/16 - Black oxide protects sockets from corrosion - Hex x 1/2  Drive impact adapter to allow sockets to be used in Power Drill / Drivers - Socket are 2" in length - Impact thin wall to get into tight spaces - Optimized socket geometry for exact fastener fit. Helps to eliminate rounding and promotes better retention on the bolt