5Colors Safety Fully Insulated Test 4mm Banana Plugs Male Stackable Connectors with Banana Jack Adapters for Multimeter Test Leads Probes 10Pcs

Great product to have if, quality is good, I highly recommend it

Worked to my plan, easy to use.

Nice and small. Cons: It takes a lot of heat to solder the wire in, so the plastic tip will most likely melt. You can avoid that by simply plugging it into another receptacle/plug while soldering it. Don't heat it longer than necessary to create a good soldering (See pictures). This plug support 12 AWG copper/stranded if needed, but you'll have to drill out the plastic hole to 4mm for the insulation. There's one other stackable safety banana plug available on Amaz (red/black-gray), but it is big and clunky but barely supports 14 AWG. I purchased both types. Pros: It has a screw terminal to fasten the wire, no soldering and no plastic tip - The metal part fits the plastic housing of theother plug with the plasic tip.

Been wanting to start making my own leads for low voltage and amp projects, not cause I'll make better ones but because cost and learning opportunities. These will be used as my first round POC portable digital voltmeter and ammeter. Pretty excited about these leads. So far, my initial tests show good quality on the banana jack adapters, they fit most of my other multimeter lead sockets. But the best part is the idea of stackable test leads during a test because sometimes.....

Good quality, and great price, acompanied with a snug fit in you’re test leads or DMM

I used AWG 18 stranded on these; the sprung hooks on the other end couldn't handle anything thicker. These plugs, however, would take much thicker wire. AWG 14 might be easier to solder in place than the thinner 18 gauge wire I had to use. After tinning the ends, I inserted them through the interior pins (there's a cavity there). It took a good bit of heating from my venerable Weller soldering station to get the pins hot enough to bond test lead, pin, and solder into a solid connection. After assembling the three pieces (plug, interior pin, upper shroud), the final result was solid. The parts snapped together firmly and the test lead was securely captured. These can be repaired, if necessary, making them a decent investment.

No way to mechanically attach wire to terminal. If you solder the wire the red plastic tip starts to melt. Need to know my test leads are 100 percent reliable.

They work well and are high-quality. They fit perfectly on my harbor freight Cyntech Multimeter. It’s nice to use your own high-quality wire. They are stackable and you can put the stock leads at the top.