Rigid phenolic construction with a black satin finish. Mobile straightedge
affords frictionless operation through the floating action of the nylon rollers
mounted on the blade. The rollers retract at a touch, securing the blade for
accurate drawing. Acrylic edges are elevated to prevent ink smears and steel
ball-bearing pulleys provide smooth movement. Comes with all mounting hardware
and installation instructions.
Click here to download the Alvin parallel straightedge assembly instructions in pdf format.