Park Tool SG-7.2 Over Sized Adjustable Saw Guide
Accurately guides a hack saw to cut steerers, integrated seat posts and even airfoil shaped seat posts up to 3.5" (89mm) or round tubes from 1-1/4" (32mm) to 1-1/2" in diameter (45mm). The SG-7 features a hardened steel body and molded contact pads to protect tubes and frames.
If you cut a lot of stuff, then this guide is the guide for you. If you cut stuff that looks like a wing, then this guide is for you. If you cut carbon stuff, then this guide is for you. It's a good guide.