Mayline Rule II w/ Metal Rollers

Finest parallel bar available. Nylon bearings glide effortlessly. High quality hardware and wire make this parallel bar a cut above the rest. Mounts to 30 inch and larger tables for a permanent t-square affixed to your table. Clear acrylic inking edges are raised to help eliminate smearing. Metal rollers are mounted on the blade of this durable mobile parallel straightedge, allowing it to move easily across any surface, then lock in place for precision marking. Made in USA.