Features: It measures in both inch or millimeters. The scales on the weld gauge are all La ser Engraving, not printing. Two locking device on the bridge welding gauge, it's easy to read the numbers. Made of stainless steel, You don'for t need to use anti-rust oil or take any anti-rust ways. Bridge Cam Gauge is a unique, versatile instrument for the inspection of welded surfaces and joints. Specifications: Material: Stainless Steel Size: approx 100x69mm/3.9x2.7in Angle of preparation, 0º to 60º Excess weld metal (capping size) Depth of undercut Depth of pitting Fillet weld throat size Fillet weld length Misalignment (high-low) Package Includes: 1x Bridge Cam Gauge note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.