Along with MONO thread, Mono SCREW thread is the basic thread applied to fine facial muscles, excellent for wrinkle care, elasticity restoration and collagen produ -ction. Unlike MONO thread, Mono SCREW thread is wrapped in a tornado shape, increasing the contact surface when inserted, promising more collagen production than MONO thread. This type of basic thread can support the general contour of the face and can be applied adapting to the parts with fine wrinkles and sagging areas, making the skin more elastic.