Item Detail Table of Content Straight Edge (18", .0001" Accuracy) Item Number: CNT6475X Supplied by CENTRAL TOOLS INC (see all) Price: 1-855-298-2687 Direct from 3rd Party Supplier Description 18" Straight Edge. Features Made from high quality heat treated steel, precision ground to ±.001" 1/4" thick for great stability Tough epoxy coating and convenient hang-up hole WarrantyOne (1) year.