IWISS 1550PCS 2.54mm Pitch Dupont Connector Kit, Includes Pin Headers, Jumper Wire, Crimp Pins for RC Servo, Arduino, SMT, SATA, EPS, PCIe, Battery Balancer

Very good

Good kit to have for Arduino, drones, etc. Make sure to get crimpers.

The dupont inserts and housings are good, though take a good 10-20 tries to get the hang of it (watching a youtube video helps here). I can pretty consistently crimp the connectors now, and have made a few servo extension cables or other logic board connections with it. The included wire, on the other hand, is not that great. It's both hard to separate and crimp.

Perfect amount of items for my custom connector.

The main issues are the female top pins, not so secure still trying to figure out how to keep them in place.

Has all the pieces I was looking for but can’t find locally. Would suggest to anyone to have this kit for price.

Okay, you got your shiny new Arduino, or Raspberry Pi, ESP32, or something else, and you're just itching to use it. You're going to need some Dupont connector wires. Now, you can go with some assorted length set of wires for a while (just search here, lots to choose from), but eventually you're going to want some custom length wires so that your mental perfection circuit doesn't keep making you wince and twitch when you look at your creations. Enter this assortment of connectors. Just bring your own wire, and you'll soon have beautiful, magazine (remember those?) cover quality, gorgeous builds. You'll be proud, and your friends will be blown away. All kidding aside, these are good. If you need to build Dupont cables, for whatever reason, get this starter kit. Oh, and get a crimper for these ends too. Don't try to use pliers, just pay the extra and get a proper crimping tool.

Bottom Line: Pins are too short and the housing is hard to use and does not lock the wire in. The old axiom applies - you get what you pay for. Items arrived on time. The organizer box worked well. There were no parts in the wrong sections - it kept them segregated well. Unfortunately, that's where the good things end - other than price. Photo 1 shows the huge difference between these pins and the normal size pins on the 40-pin parts. Photo 2 is a close up of the comparison. The pins are about half the size, which means they won't stay in as securely as the authentic (widely used) pins from Arduino. Photo 3 shows the difference between the actual Dupont wire connectors and these. Again, the pins are much shorter. They are so short, they sometimes won't even reach the contacts on the Arduino boards to hold into place. They remain a loose fit on the boards. The housing is very difficult to use. I had to use two sets of pliers to push it in all the way - and the pins were still too short for the Arduino boards. Photo 3 shows the difference in the length of pin that sticks out after properly fitting it inside the housing. This was using 22 gauge wire (standard size for breadboards). I gave up on them and will try to return the kit. I recommend you pay a little more for the real things. Making Dupont wires will be much easier, have less waste, and will work much more reliably.