This spiral-thread sleeve is a dedicated accessory for UBE visual ring saws. The integrated T-handle offers stable grip for pushing and rotation. Spiral anti-slip threads cover the tube to fix position and prevent slipping during operation. The beveled tip gently separates soft tissue to minimize trauma. Polished medical stainless steel resists disinfectant corrosion and allows repeated autoclave sterilization for spinal endoscopic decompression surgery.