Fielect 20Pcs 3A Alligator Clips with Insulated Cover - Heavy Duty Crocodile Jumper Test Clamps for Electrical Wiring, DIY Projects & Automotive Repairs - Perfect for Battery Charging, Circuit Testing & Electronics Work

They’re really good quality and looks durable. Size is perfect but I had to return it coz it was missing the screw used to secure the wire/cable to the clamp itself and I looked like it was a return and dirty.I ordered these to connect all the electronics in my boat to my battery. Needless to say they were a lot bigger than I anticipated. They seem to be of good quality, however they just don’t serve my purpose. I decided to throw them in my toolbox because I’m sure someday I’ll find a use for them. The plastic insulators could have been a little more pliable.These are COPPER ! The only steel is the center pin. And, the vinyl sleeve is not slippery so they don't seem to flip when you try to use them. I used super flex, silicone wire, high temperature wire to make up two sets of 15 clip leads to replace the junk you see at most hamfests.Not worth even the little money they cost. Very flimsy soft metal easily distorted in normal use.Great clips.Great product