Feature: 1. Long Service Time: High strength impact grade CR V sockets withstand more torsion from impact tools and ensure longevity. Premium black oxide finish provides maximum conservation from rust. 2. Enhance Stable Design: Concave 6 point hex socket design grips the flat sides of fasteners, not just the corners, preventing round off deterioration under high torsion and hammering stress when used with impact and electric wrenches against fasteners. 3. Visible Size Code: All 1/2inch deep impact sockets are engraved with size mark for quick identifies drive socket specs and measurements. 4. Classification Box: A solid plastic storage box is included for convenient drive socket organize and store, and make socket transport more easy. 5. Most Used Size Are Inlcuded: Set include 1/2inch drive high torsion impact sockets (metric) 10mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 19mm, 22mm, 24mm, and with length 80mm long. Specification: Item Type: Drive Deep Impact Socket Set Color: Black Material: CR V Square Socket Size: 1/2in Hex Socket Size (Metric): 10mm / 0.39in, 12mm / 0.47in, 13mm / 0.51in, 14mm / 0.55in, 15mm / 0.59in, 16mm / 0.63in, 17mm / 0.67in, 19mm / 0.75in, 22mm / 0.87in, 24mm / 0.94in Length: 80mm / 3.15in. Package List: 10 x Deep Impact Socket1 x Storage Box