I bought these clamps expecting superior quality, especially given the Fluke name, and am very disappointed. Firstly the rubber boot goes too far and it will be difficult for you to clamp the wire and secondly the alligator clip will NOT snap like a resistor on a small wire without it slipping through the clamps and not working. Contact. My cheap radio store leads have better alligator clips than these. Unfortunately I cut the rubber cover in such a way that I can't get hold of things and get them back.