CMT 891.521.11 1-Piece Rail & Stile Bit, 2-Inch Diameter, 1/2-Inch Shank Board Thickness from 23/32 to 7/8-Inch, 3-29/64-Inch Overall Length. Two cutters in one bit, providing innovative, efficient means to mill stiles and rails. Adjust he height of the bit to cut two perfectly matched profiles with no wasted time. 2 SinterHip Hi-Density Industrial Chrome Carbide cutting edges for long-lasting performance. Non-Stick Orange Shield Coating, Anti-Kickback Design, Equipped with Bearing.