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

If you like building really cool, random projects, or learning how to get into tying components together in an easy to "swap and replace components" way then yes! For example, I am using the components in this kit to built a cool retro desktop/bartop looking arcade meant for playing old-school video games with joysticks and push buttons like the original arcade.

Exactly as described

I bought this along with an IWISS SN-025 (which is great, btw). The crimping of the pins I think I have figured out thanks to youtube videos. But I have quite a bit of trouble pulling the crimped pins then through the connector block and locking them in reliably. I often end up having to use a long-nosed pliers to pull the pin, and this sometimes deforms (flattens) the end of pin a bit. The clips on the connector blocks also sometimes appear not strong enough to prevent the wire from pushing back out when e.g. inserting the connector into a breadboard. It could be just my inexperience but it is worth noting. I have not done this type of crimping before and cannot say if this is "normal". Apart from that, there are more than enough of the black connector blocks. I'm sure I will run out of the individual pins before I run out of any of them.

Works great, good fit. Easy to use.

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.

Very complete selection of connectors and color coded wires.

they work, not DuPont quality, but usefull

Good individual pieces. But I think the box was damaged during shipping. (On a paper bag)