I used to review the Fluke AC285 alligator clips. These are her younger brothers. Like the 285, the AC220 requires a double banana jack test lead to function. I use Fluke TL224 silicon wires. However, after searching, I found two other manufacturers that make this type of leash. However, I prefer Fluke silicone rubber wires. Once connected, these test leads (which are larger than I expected, see photo on product page) are Fluke's 'premium' answer to the more traditional 'pointy' alligatorโฆ