It's specially designed for brake pads with normal 6mm-thick back plates (level IV, V).
NQEUEPN Brake Pad Thickness Gauge, Measure Tool M, black silver
Brake Pad Measuring Tool, Brake Pad Thickness Gauge with Scale Brake Pad Gauge
NQEUEPN Brake Pad Measuring Tools, Combination M, Multicolor
Brake Pad Thickness Gauge Tool with Scale for Vehicle Brake Pad Wear Inspection
Brake Pad Thickness Measuring Tool with Scale for Vehicle Brake Pad Inspection
Brake Pad Thickness Gauge, Brake Pad Measure Tool with Scale for Auto Internal