Includes a set of six 1/4 inch hex shank keychain extension bars, each in a different color for easy identification. Key features and benefits: Six distinct colors help quickly distinguish between extension bars, reducing time spent searching for the right tool. 1/4 inch hex shank design ensures compatibility with standard hex drive tools, drill drivers, and bit holders. Compact size makes them easy to carry and store, whether in a toolbox or attached to a keychain. Durable construction provides reliable performance for both professional and DIY applications. Keychain feature allows for convenient access and portability in any workspace. Practical use scenarios: 1. Ideal for quick bit changes when working in tight spaces, such as inside cabinets or electronics housings. 2. Useful for keeping frequently used driver bits readily accessible during assembly or tasks. 3. for onthego toolkits, allowing tradespeople, technicians, or hobbyists to efficiently handle fastener jobs anywhere. Material and performance: Made from strong, wearresistant materials to withstand repeated use. Designed for secure bit retention and smooth operation during drilling or driving tasks. This set combines practical portability with colorful organization, making it a reliable accessory for anyone needing quick, efficient tool access.