So you sent me the wrong product. What I ordered in the picture was a bare metal alligator clip. That way I can attach other alligator clips to it for continuity. The ones I received are metal insulated so I can't attach other alligator clips to them. So either the part number was wrong or the picture on the website was wrong. The sleeve that you insert the probes into has a spring sleeve so that they hold onto the probes well and don't wobble a lot. I was trying to save some money. Years ago I bought Chinese fakes. They look the same but have a cheap metal sleeve with no spring so they don't stick well to the probe tips. They slip off very easily. They wiggle a lot, so sometimes I think the probe tips aren't in the metal sleeve, so I pull them back together to make sure they're seated correctly. If you want reliability, get the Fluke OEM and stay away from the cheap ones. $30 for them is a steal. Instead, they should be worth $20. But I needed reliability, so I went with the OEM.