Precision made feeler gauges feature long tapered leaves to get into tight spots better than straight-sided leaves. Each leaf is clearly marked for size. Individual leaves may be removed for special applications. Mfg: Brownells SPECS: Steel. Tapered leaves. Inch – 26 leaves. 3" (7.6cm) long. .015" and .025", .002" to .020" in .001" steps. Metric – 28 leaves. 3.9" (10cm) long. .05mm to .14mm in .01mm steps. .15mm to 1mm in .05mm steps.