SIMPLE INTERFACE: This digital angle finder features a straightforward 4-button interface for easy operation: ZERO to recalibrate at any position, HOLD/FLIP to secure your reading, REV. to display the outside angle measurement, and ON/OFF. COMPREHENSIVE RANGE: Our digital protractor features a 360 range and an ergonomic Angle Lock knob, allowing precise inside, outside, and reverse angle measurements?perfect for detailed projects. HIGH-RESOLUTION DISPLAY: This angle finder features an extra-large LCD screen with 0.05 resolution and a durable 7-inch anodized aluminum rule with laser-etched millimeter and inch markings for precise measurements. ROBUST PROTECTION: Each digital angle gauge comes with a heavy-duty zippered pouch that protects the tool during demanding tasks such as woodworking, flooring, and tiling. UNMATCHED ACCURACY: Each digital protractor is assigned a unique serial number and undergoes rigorous testing. Our quality control process ensures an accuracy standard of +/- 0.3, guaranteeing reliability and precision with every use.