These 8° dovetail bits are designed especially for use with the Leigh Dovetail jig, #45828, diameter (D) 1/2, angle (a°) 8°, cutting Height (B) 0.825, shank (D) 1/4, overall length (L) 2-3/4, Type Leigh #80, flutes 2, Carbide Tipped Dovetail 8 deg X 1/2 dia x .825 x 1/4 inch Shank