This endoscopic ring saw is specially developed for UBE spinal endoscopic surgery. It is equipped with a symmetrical T-shaped double handle, which enables balanced force from both hands during rotation and ensures stable, labor-saving cutting. The slim extended shaft fits tiny minimally invasive dual-channel incisions. Clear depth markings on the shaft allow surgeons to accurately control cutting depth under direct endoscopic vision, preventing penetration through vertebrae that damages posterior nerves.