Wide Compatibility: This set includes chuck keys in sizes 3/4" (20mm), 5/8" (16mm), 1/2" (13mm), 3/8" (10mm), 1/4" (6mm), 5/32" (4mm), perfectly suited for a variety of drill bits and power drills. Durable and Sturdy Design: Made of high-quality carbon steel and coated with durable plastic, these keys resist corrosion and daily wear, ensuring long life and trouble-free reliability. Easy Use and Storage: Thanks to Their small size makes these chuck keys easy to store and handle, making changing drill bits quick and effortless, maximizing your efficiency when working. Comfortable and Secure Grip: The ergonomic, non-slip design ensures a comfortable and secure grip, allowing precise control when tightening or loosening chucks, reducing the risk of accidents. Versatility and Universal Compatibility: Ideal for professionals and DIY enthusiasts, these universal chuck keys are compatible with most brands of power tools, providing a convenient solution for replacing lost or damaged keys.