For angling the temples of zyle and wood. Place the metal jaw against the hinge base and the recessed fiber jaw against the plasdtic surface to protect the finish. The metal jaw is cut out to clear the hinge on a frame with offset shields. Fiber pliers jaws..
Adjusting for pantoscopic angles and making alignments. Holes in Pliers jaws fit over temple hinge screws ends for easy adjustment. Wide jaw fits around even the widest temples...