Sumnacon 5Pcs Banana to Banana Plug Test Lead, 4mm Stackable Banana Plug Wire Test Cable Lead for Multimeter, Electrical Test Wire 1000V/15A 6.6Ft/2M

These are fairly good test leads, and are not magnetic so they are probably actually copper inside. Insulation is soft and bendable and they do their job great. I have been slowly buying several of these with different ends for the various test gear on my work bench and have been pleased with them so far.

Build quality was comparable to Pomona . Insulation was soft and flexible . Conductor diameter indicates 16 Gauge copper wire . At 3.0 Amps the Voltage drop was only 53.0 mVDC from end to end . Very impressive . Highly recommend.

Good quality wire and connectors. Can't be beat for this low price.

I'm good with these, solid, and seem sturdy enough. I use them every day more or less.

Cable has the feel of a high quality test lead. Plug tolerance is iffy; some are looser/tighter than others. However, it does not seem to have any effect on conductivity. Did not receive any bad leads but I have before on similar products. I just replaced the bad ones and never had a problem with the rest. *small rant* people leaving 1 star reviews because they associate a few bad cables as something that equates to unreliability are ridiculous. I would think people buying this product are at least somewhat scientific minded. There is very little correlation between poor QC and product reliability. Even big name $100k test equipment comes in bad on occasion; sometimes even with a high rate of failures. Just because somebody catches it early before it makes it to the customer does't make their product more reliable. It only means you never find out about it. The key here is whether the construction of these cables are good or bad. So far nobody dropping 1 star reviews has bother to cut open their supposedly untrustworthy cables to see if it has proper quality construction. Additionally there is a myriad of tests that can be performed; likely the same ones a manufacturer would use to certify their product. That's the only real way to tell if its just a defect or poorly made. In case you're wondering I stress test my cables with high voltage (240v) at 10A for 30min; perform a frequency sweep; and a resistance test. This tells me all I need to know for my own use case.

These are the best! If you do much with electronics or electrical, you know how much time can be wasted with unreliable test leads. These silicon test leads are very flexible, yet provide solid and reliable connections - while being reasonably priced. They are rated at 1000 V, which I assume is AC. I've used them in short-term, low-current tests at 2000 VDC with no problems. I haven't used them past their 15 Amp rating, and don't recommend doing so. The 5 colors are very useful, although I'd like to have a 6th color, especially white.

I use these test leads mostly with my oscilloscopes when working on vehicles. They also work well with my automotive multimeters. The long length is great when I want to keep the oscilloscope out of the engine compartment. i can keep the oscilloscope on the cart while doing my tests. They would buy again and may buy some more soon.

Very satisfied with these cables. What I liked most is that the banana plugs fit firmly into the female jacks of my multimeters and bench power supply, which is not always the case with inexpensive test leads. I have used similar cables from other sellers where quality varies significantly and some banana plugs fit loosely or make inconsistent contact. In this case, every connector fit firmly and consistently. The mechanical feel is good and the connection feels solid. I also measured the resistance using a dedicated low-resistance (4-wire/Kelvin) meter and consistently obtained values between approximately 38 and 41 mΩ for the pair of cables connected end-to-end, which I consider a very good result for 1-meter stackable banana cables. This helps reduce measurement errors and minimizes voltage drop, power loss, and heating compared to higher resistance leads. Regarding the 15 A specification: personally, I think it should be taken with some caution. With approximately 38–41 mΩ measured, at 15 A the voltage drop would be around 0.57–0.62 V and power dissipation would be roughly 8.5–9 W distributed across the cables and connectors, so I would not consider them ideal for prolonged continuous operation at 15 A. For moderate currents and laboratory use, however, I think they perform very well. Overall: good connectors, low resistance, firm fit, and highly recommended for laboratory work, testing, and general measurements.

If you do a lot of electrical testing and work, then these are great. Plan on buying more when I get time to build my multi-voltage test box

Not crap, good for home lab. No failures so far, nice and limp cables.

good quality wire, andends work as advertised.

They are almost 1 meter long each. Feels very soft, but strong enough. I've not checked the resistance of wires but I'll update this review soon.

Works great, very flexible and endless combinations if you have different banana plug ends.