Japanese S-3 Cobalted stainless steel. Premium hand-forged Japanese thinner-blender. Ergonomic design – crane handle design for completely natural hand position, maximum spacing between the thumb and finger rings to prevent cramping when closing the thinner. 360 degree swiveling thumb allows the stylist to use all cutting techniques and positions with the minimum strain on the hand, elbow, shoulder and back. For anyone suffering from carpal tunnel, tendonitis or any shoulder or back problems. Swivel thumb can be “locked” into position if desired. Convex edge and hollow-ground blades. Adjustable dial with leaf-spring tension system. 6″ blade with 15 teeth or 35 teeth (wave-cut for smoother cutting). Also available in a cutting scissor. Includes complimentary scissor case.