Specification:Blades: 13 PiecesMaterial: BrassMeasure Range: 0.05-1.00 MillimetersOverall Size: 107x13mm / 4.2×0.5 inch (L*W)Metric Sizes(mm): 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00 Feature:Each leaf has a laser etched size for easy identification.Blade protector has thumb notch to aid in removal of blades.Suitable for designers, engineers, mechanics to measure the thickness of tappet clearances, spark plugs gaps, bearing clearances, piston ring gaps and other.Note: The new item may be greasy for anti-rustiness oil, please clean it before use. Package Content:1 x 13in1 Feeler Gage.