Spark plug gapping tool laser-etched markings withstand 15,000+ wipes—50% more durable than engraved rivals. Precision Dual-Marked Blades: Feeler gauges 48 laser-etched blades (0.03–1.00mm / 0.001"–0.508") cover 98% of automotive specs, including ultra-thin 0.03mm for hybrid engines.
