Name That Dealywhopper

[rgaddi]

I just broke my next to last one of these, and I can't remember what they're called to buy replacements.  They plug into the end of a FET probe and make it so that you can't short to adjacent pins of fine-pitch parts.  I think the blue are pitched for 0.65mm and the red for 0.5mm.

Anyone remember what these things are called?  They're fantastically useful.

[pigrew]

Tektronix Surefoot, perhaps SF501, SF502, SF503 ?

[rgaddi]

Yep, that's exactly it.  They seem to be unavailable from Tek, but eBay's got them for $25-30 for a 12-pack. 

Thanks for the help.