ITEM NAME:6mm to 14mm All Sizes Hex Key Bit Drive Socket Adaptors Tool OZ Material: CR-V alloy steel (sleeve) / S2 alloy steel (batch header) Model: Hex Square head size: 1/2" (12 mm) Specification: 6mm / 7mm / 8mm / 10mm / 12mm / 14mm Color: As picture shown Features 1, Made of CR-V and S2 advanced alloy steel 2, Hardness are reached HRC56-60, and compare with similar products, it is the hardness, toughness, durability, service life increased by 35%. 3, Thicker plating surface, peel resistance, corrosion properties. Heat treatment are using sealed to protective gas. Make the sleeve has high hardness. At the same time has high toughness 4, Suitable for cars, Computers, household appliances and other precision equipment repair special tools. Package include 1X hex key.Specification: 6mm / 7mm / 8mm / 10mm / 12mm / 14mm. Model: Hex. 1X hex key. 3, Thicker plating surface, peel resistance, corrosion properties. Make the sleeve has high hardness. Material: CR-V alloy steel (sleeve) / S2 alloy steel (batch header).