Holders are 5-3/4" long. Flat holders are made of plastic & round holder is made of aluminum. Color coded for easy grit identification. Cross Section: 3mm x 50mm

Strong and incredibly flexible polishing stones for use by hand or with ultrasonic polishers. Ideal for use in close quarters and areas of tight tolerance. The ultimate precision polishing tool, imparts uniform finishes on molds, dies and precision components. Produces excellent finishing results on stainless steel, alloys, aluminum, brass, silicon, magnetic material and plastic.