Star Burr: 20mm (3/4″) Diameter, 1/4″ Shaft.
Grit sizes available: 80, 120, 220, & 400 grit High Quality Nickel Plated Diamond on a Steel Blank.
Cautions: Maximum Speed Rating: 16000rpm. Always wear safety goggles. Always wear an appropriate mask so you do not breath in particulates or harmful vapors. Always wear hand and body protection. Failure to adhere to these cautions can result in serious injury or death.