Cut much deeper flutes than possible with a regular core box bit. Perfect for making flutes on CNC machines, #45948, diameter (D) 2, radius (r) 1, cutting height (B) 1-1/4, Shank (D) 1/2, overall length (L) 2-3/4, Max RPM 14, 000, flutes 2, Carbide Tipped core box 1 inch radius x 2 inch dia X 1-1/4 x 1/2 shank extra deep