DK-4 Non-Conductive Probe, Small
DK-3 Large Non-Conductive Probe
The non-conductive probe provides more digging ability than a standard round probe, and can be safer to use than a steel knife under some circumstances. These are a consumable item, depending on the soil type and use the tip will wear down over time, so there is no lifetime warranty on the non-conductive probes. 5 blade, 8-7/8 overall.