For over 100 years, C.K has been a leader in hand tool manufacturing, providing high-quality tools that meet the rigorous demands of trade professionals. Our tools are designed to deliver top performance, durability, accuracy, and strength. Working closely with metallurgical and design engineers, we continuously innovate by developing new materials, manufacturing techniques, and finishing treatments to enhance performance. Through collaboration with a diverse group of trade professionals, we create tools that streamline everyday tasks and revolutionize working practices. The C.K T4521 Screwdriver Bit Clip Set features 8 slotted bits ranging in sizes from 3mm to 9mm.