Supplied with 20 sizes, this hex key set includes both Imperial and Metric sized carbon steel, extra long arm ball driver hex keys. Coming in a plastic carry case, it's the ideal product to ensure you're covered for all sizes of hex head screw and bolt adjustment. Each item can be used at angles of up to 30° and is manufactured from a high grade carbon steel that meets international standards. Features and Benefits • Manufactured from high quality steel to guarantee product longevity and hardiness • Includes both imperial and metric sizes to ensure you always have the correct hex key for any application • Supplied in a handy carry/storage case to allow you to easily transport your hex keys • Kit includes 20 sizes to ensure you have the correct size for a host of jobs Typical Applications • Hex keys are ideal for use when loosening or tightening hex head screws and bolts, which are typically found in machinery and bicycles Standards • Metric to ISO 2936 and Imperial to DIN 911