Feature: *High strength chrome vanadium steel sockets withstand greater torque from impact tools and ensure longevity. Premium black oxide finish provides maximum protection against rust and corrosion.* Concave 6-point hex socket design holds the flat sides of fasteners, not just the corners, preventing rounding deterioration under high torque and hammer stress when used with impact and power wrenches against fasteners.* All 1/2 inch deep strike sockets are engraved with a size mark to quickly identify drive socket specifications and measurements.* A sturdy plastic storage box is included for convenient drive socket organizing and storage and for easy transport of sockets. *Kit includes 1/2 inch high torque drive impact sockets (metric): 8mm, 10mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, adapter 18mm, 19mm, 22mm, 3/8'' to 1/2 '' and 78mm long. Specifications: Product Name: Socket Wrench Set Material: Chrome Vanadium Steel Color: Black, Green Length: (approx.) 78mm Square Socket Size: 1/2 Inch Hex Socket Type Size (Metric): 8mm, 10mm, 12mm, 13mm, 14mm, 15mm, 16mm , 17mm, 18mm, 19mm Type B Hex Socket Size (Metric): 10mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 19mm, 22mm, 3/8'' to 1/2'' Adapter Optional Type: Type A, Type B Suitable for: electric wrench, ratchet wrench, electric hand drill Quantity: 10pcs set Package includes: 10 socket wrench set Note: 1. Transition: 1cm = 10mm = 0.39 inch.2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.3. Please allow slight manual measurement deviation for the data.