For fine-line "engraving" in wood and composite Materials, Use either of these compact bits. Two-flute configuration and modest length (which minimizes vibration) combine to produce crisp, clean cuts., #45628, diameter (D) 1/4, angle (a°) 15°, cutting Height (B) 0.666", shank (D) 1/4, overall length (L) 2-1/2, D2 3/32, flutes 2, D1 0.020", A1° 45º, 45628 Solid Carbide V Groove engraving 15 deg X 1/4 dia x 0.666" X 1/4 inch Shank