Planning on cutting aero or standard tube shapes' Then you'll be needing the Park Tools SG 7 Oversized Adjustable Saw Guide that is unless jagged edges and sloppy cuts are your kind of thing. We're hoping that's not the case, though. With Park Tool on your side, you'll accurately slice trough steerer tubes from 1 14 to 1 12 inch, integrated seatposts, and any airfoil shape up to 3. 5 inches. Contact pads are included to protect tubes and frames, so you won't scratch the areas that you want intact.