Personally, I bought this set specifically for the mini-hook grabbers, and the other attachments were just a bonus. From the ad it seemed clear that all three of the attachments connect to the long extension leads. However, this is not the case! The alligator clips and the standard needle probes do, but the mini-hooks do not. They are meant to plug directly into your multimeter/instrument. The problem with this is that they are so short, your DMM needs to be within 1 foot of your circuit-under-test.