This bit's specially designed carbide center Tip enhances the speed of plunge cuts. At the same time, it extends the life of the cutting edges by reducing the stress of plunge cuts on their tips. Ideal for Mortising and other plunging operations., #41448, diameter (D) 1, cutting height (B) 1, shank (D) 1/2, overall length (L) 2-5/8, flutes 2, 41448 carbide Tipped straight plunge high production 1 DIA x 1 inch x 1/2 shank