CGW Gemini Mounted Point, 3/8 in Diameter Head, 3/4 in Length of Cut, 2-1/2 in Overall Length, Cylindrical - No End Cut Shape SA Head Shape, Aluminum Cut, 1/4 in Shank Diameter, Carbide Head, 50000 rpm Maximum, Applicable Materials: Aluminum, Hard Rubber, Magnesium, Non-Ferrous Metals, Plastic, Zinc Alloys and other Soft Materials, Industry Specification: SA-3NF.