Features Used to measure and adjust spark plug gap. Surface printed with both metric and inch reading. Heat treated spring steel wire, high hardness and not easy to decompatible withm. Chrome-plated round shell, wear resistant and no rust. Firm rivet linked structure, anti-impact and durable in use. Features: Used to measure and adjust spark plug gap. Surface printed with both metric and inch reading. Heat treated spring steel wire, high hardness and not easy to decompatible withm. Chrome-plated round shell, wear resistant and no rust. Firm rivet linked structure, anti-impact and durable in use. Specification: Material: Metal Metric Size: 0.64-0.76-0.86-0.89-1.02-1.14 Inch Size: 0.025-0.030-0.034-0.035-0.040-0.045 Package List: 1 x Spark Plug Gap Gauge Package List