Welding Taper Gauge 30-45mm(3/16-3/4) gap slot width hole size metric&inch gage Taper welding gauge 13/16''-2''3/8 & 45-60mm Inch / Metric Measurements read in standard one side, and metric on the opposite side Laser printing technology marks the scale to make it clearer Stainless Steel has strong corrosive Packed in synthetic leather bag for the convenience of storage and carrying