Full metal construction with aluminum jaws and hardened steel guide plates for straight cuts every time Fits tube sizes from 19 mm to 39 mm (3/4" to 1-1/2"); everything from handlebars, many seatposts, and 1-1/2" steerers Laser etched sizing scale provides quick reference of jaw position Easily set slot width for standard or carbon blades by moving spacer plate position. PRO CUTTING GUIDE