Since started the production of Oil-Pulse Tools about 30 years ago, we have been continuously developing advanced mechanisms. Featured with unique Air/Hydraulic mechanism, URYU Oil-Pulse Tools have now come to the fourth generation "ULT Ultimate Series" passing through the first generation "U Single-Blade Series", the second "UX Two-Blade Series" and the third "ALPHA Double-Chamber Series". ULT Ultimate Fastening Tools achieve tremendous light weight & short size in addition to numerous features and benefits to raise your productivity.