Digital Micrometer Thickness Gauge SAE & Metric - Non-Magnetic, Non-Rust Composite Instant thickness measurement for materials and work pieces; accuracy to +/- 0.001"/0.03mm Capacity 0.5"/12.7mm, resolution 0.0005"/0.01mm; instantly converts SAE to metric, vice-versa Non-magnetic, non-rust lightweight composite material; easy-to-read LCD Powered for months by single LR44 1.55V button battery (included); auto-off extends battery life Zero-out scale function, anvil pull-back trigger; 4"L x 1.5H x .85D, jaw depth 5/8", weight 2 oz