Accurately guides a hacksaw to cut aero-shaped seat masts & seat posts up to 2.75” (70mm), as well as fork steerer tubes & other round tubes from 1-1/16” to 1-3/4” (27mm to 45mm). The SG-7.2 features two different cutting slots--standard & carbon cutting blade widths--in a hardened steel body with moulded contact points to protect tubes & frames.