Lever Lock Rolling thumb mechanism for one hand use Lock screw to hold jaw in position Longer extended battery life Zero setting in any position. Can be reset at any time Switch between mm and Inches with a click of a button Easy to read, large LCD screen 26 Hardened, Tempered Steel Blades Measures: 0.0015 Inch (0.038 mm) to 0.025 Inch (0.635 mm) Chrome Plated Main Shaft for Easy Clean Up and Professional Look Each Blade is Laser Etched with Inches and Millimeters Blade Protector has Thumb Notch to Aid in Removal of Blades 1 - 6 Inch Digital Caliper with LCD Screen Hard Plastic Storage Case 1 - Feeler Gauge Included - 26 Hardened, Tempered Steel Blades. Measures: 0.0015 Inch (0.038 mm) to 0.025 Inch (0.635 mm) Includes helpful and easy to read operating instructions