If you do any sight replacement or tinkering on your 1911, a set of calipers is a must.  This budget priced set of calipers will get the job done without breaking the bank!

This 4" digital caliper lets you take inside, outside, depth and step measurements with an accuracy of ± 0.001" (0.03mm). Measurements are easily read on the caliper's digital LCD display, and the on/off switch has automatic shut-off to preserve battery life. Powered by one 1.5V button cell battery (two button batteries are included).

• Resolution: 0.0005" (0.01mm)
• Accurate to ± 0.001" (0.03mm)
• Metric and "inch" digital display
• Measuring system: Linear capacitive
• Uses one 1.5V button battery

Includes two 1.5V button cell batteries.