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