Specification:Material: Stainless SteelOverall Size: 100x10mmHole Diameter: 5mmFeeler Gauge Thickness: 0.09mm Features:With a hanging hole, to save.Has a laser etched size for easy identification.Suitable for designers, engineers, mechanics to measure the thickness of tappet clearances, spark , g clearances, piston ring gaps and other. Package Content:4 x Feeler Gage.