This test lead set is very poor in quality and workmanship. The wire gauge is much smaller than a 20 gauge, maybe three of four strands. The connection of the wire to the alligator clip is jut crimped and will cause intermittent connectivity problems due to very poor manufacturing. I opened one of the packages and tested the leads. Only one test lead was working. All the other leads were open. I had to solder the wire to the alligator clip for these to work properly. There is even a hole on the alligator clip that should be used for soldering the wire!
I wasted time debugging my circuit not working due to these leads being open.
NO NOT WASTE your money on these. I would suggest to find a reputable manufacturer!