Sidewinder-3: features Pathfinder sharpened steel chisel point, which clears a wide path for the ferrule and shaft to follow, for less shaft resistance and deeper penetration. Works well with larger diameter aluminum shafts. Angle of blades is 55deg. from the center axis; blade thickness is .036", with 1-1/2" cutting diameter. Sidewinder-3LT™: features the same construction as the Sidewinder™, but weighs less. Blades are interchangeable with the Sidewinder. NOTE: the big tip of the Pathfinder chisel point will not fit on the Sidewinder-3LT.