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.