An 8 1/4" Lambert rasp – 15mm is a type of surgical instrument used for bone shaping and smoothing. It is 8 1/4 inches long and features a 15mm blade. The Lambert rasp is typically used in orthopedic procedures or surgeries that involve bone or cartilage reshaping. The size of the blade (15mm) indicates the width of the cutting surface, allowing for precise and controlled removal or smoothing of bone surfaces, particularly in joint or skeletal surgeries.