These straightedges are made of 304 stainless steel with an electro-polished finish that will not corrode and have a precision-ground beveled edge that remains straight and true after many uses.
Model HMA-135 has no markings.
Model HMA-135A has laser-engraved graduations at 0.5in intervals from 0 to 6in (0 to 152.4mm). Graduations are marked with inch and millimeter equivalents.
Please enter your questions/comments and contact information below. A Karol-Warner customer service representative will respond during business hours (8am - 5pm EST, Monday through Friday).