Check Undercuts/Pits, Porosity, Crowns.
5 Inch / Fraction - Undercuts/Pits to 1/4 Inch, Crowns to 1/4 Inch by 1/64 Inch Increments.
5d Inch / Decimal - Undercuts/Pits to 0.240, Crowns to 0.240 by 0.020 Increments.
5m Metric - Undercuts/Pits to 6mm, Crowns to 6mm by 0.5mm Increments.