The Pro Saw Guide`s full metal construction delivers straight precise and clean cutting of all threadless steerer tubes from 1` to 1.5` handlebars and many sizes of seatpost. Full metal construction with aluminum jaws and hardened steel guide plates for straight cuts every time. Fits tube sizes from 19mm to 39mm (0.75` to 1.5`). Laser etched sizing scale provides quick reference of jaw position. Easily set slot width for standard or carbon blades by moving spacer plate position