iFixit Digital Calliper

Precision machined, hardened steel measuring jaws. Displays millimeters and decimal inches. Track screws on iFixit Guides which list screws by length. Improve the quality of your guides. Range: 0-6 inches (0-150 mm). Resolution: 0.0005" (0.01 mm). Accuracy: ±0.001 inch (0.02 mm).