Probe holder ASM213382 1 Holes for attaching the holder with screws (screws not included) 2 Magnet 3 Probe attachment The probe holder is a versatile mounting accessory for securing Ø 12 mm diameter cable mounted probes. To attach the probe, simply press the body of the probe into the probe attachment. HMP115 and TMP115 probes have a groove that locks the probe in the holder when it is centered in the probe attachment. HMP110 probe in the probe holder