First, let's be clear.  This is not a set of probes with permanently attached leads. If you want the version with leads permanently attached, you want the TL175.  These TP175E are modular probes with a shrouded banana jack on the back end.  To use these probes you need to purchase at minimum a set of leads with banana plugs on both ends.  An excellent (and highly recommended) example would be the Fluke TL224.