Description: 【Premium Quality Material】: This hex socket set is crafted from smithing and heat treated alloy steel, ensuring exceptional durability and long performance 【Resistant Erosion Finish】: The sockets feature a fully polished, chrome plated mirror finish, while the bits are treated with zinc phosphate 【Versatile Application】: Ideal for use with manual tools, this hex bit set includes all essential sizes needed for tasks involving bicycles, cars, home appliances, lawn equipment, machinery, and any other projects requiring hex/allen bits 【Construction】: Made from chrome alloy steel, these tools are designed to withstand rigorous use while maintaining their integrity over time 【Comprehensive Set】: The package includes a nine piece set of sockets ranging from H4 to H17, with an overall length of 100mm and a bit length of 60mm fitting into a 12.5mm square hole diameter Specification: Material: Chrome Alloy Steel Size Chart: Hole Inner Diameter: 1.25cm/0.49inch Bit Length:  6cm/2.36inch Package Includes: 1x Hex Bit Socket Set Note: Please allow slightly errors 1-2cm differences due to manual measurement.