Probes are used to measure periodontal pocket depth in millimeter increments. All Nordent Probe tips are made from spring tempered stainless steel and machine ground to exacting tolerances. The millimeter measurements are precisely cut into the Probe tips. Color coding is applied to Probes under extreme temperatures so that the color penetrates the surface of the tip. Probe tips undergo additional tight tolerance grinding to achieve the desired readability for each marking. All tips are then hand formed into their final shape by expert craftsmen.