What's its right name and where to buy this ...

[albertofenini]

Hi everyone,
this came out of my high school drawer, and it is quite useful while measuring
values or waveforms from an IC.
We would like to buy bigger and "longer" models, but I can't find them on any shop
I have written to the maker (Cliff) but with no reply,
Does anyone know what's the technical name so that we can narrow the search ?
Thank you so much !

Pictures here : IC tool