A 12" Putti bone rasp – 10mm to 4mm is a specialized surgical instrument used for bone shaping and smoothing. It has a total length of 12 inches and features a blade that tapers from 10mm to 4mm in width, allowing for a gradual reduction in the size of the rasp's cutting surface. This design makes it ideal for precision work where a surgeon needs to smooth or shape bone tissue with varying degrees of thickness, such as in orthopedic or reconstructive surgeries.