High quality bits with 4 mm half-moon drive. Optimized for Japanese PH screws. Hard design. We firmly believe that our tools make life simpler, safer and 'full of joy' for our users. We shall never be content with existing standards. There are many screw driving tools: but unlike others, we do not believe that tools have reached their ultimate stage of development. We are always searching for new ideas. We think differently. We question things. And in so doing, develop screw driving tools such as the Zyklop ratchet and the Joker open-end wrench - tools that have turned the familiar into the ordinary. 750 Tool Rebels enjoy reinventing screw driving tools every day and on working on problem solutions for you.