What are these?

[TinselKoala]

It's just a wire jumper! If you split it apart you will see that it's just a wire, straight through. It has a "body" so that it can be handled by the same automatic insertion machines as put in the resistors on a PCB, as the Wiki entry says. 
Not used much anymore, the insertion machines are better and the PCB designers avoid using jumpers whenever they can.

[Legalizeshemp420]

It's just a wire jumper! If you split it apart you will see that it's just a wire, straight through. It has a "body" so that it can be handled by the same automatic insertion machines as put in the resistors on a PCB, as the Wiki entry says. 
Not used much anymore, the insertion machines are better and the PCB designers avoid using jumpers whenever they can.

Only used much with single sided boards as it saved the cost of what used to be really expensive double sided making.  Hell, these days everything is going SMD because you don't need to drill holes so one less machine to deal with. :/  Wave soldering to the rescue but I hate SMD for personal hobby type work.

[Pirate88179]

It's just a wire jumper! If you split it apart you will see that it's just a wire, straight through. It has a "body" so that it can be handled by the same automatic insertion machines as put in the resistors on a PCB, as the Wiki entry says. 
Not used much anymore, the insertion machines are better and the PCB designers avoid using jumpers whenever they can.

Yes, I read that in the Wki entry.  I guess then, technically, they are not 0 ohms right?  I mean, that wire has some resistance to it, which is why I thought they had figured a way around that maybe.
(Room temperature super conductor perhaps?  Ha ha.)

So, these add no more resistance than the jumper wire...I get it.  Slightly false advertising though.

Bill

[Lakes]

Its really a micro-ohm resistor or micro-henry inductor.

[fritz]

Its really a micro-ohm resistor or micro-henry inductor.

Or better -  a milli-ohm resistor and nano-henry inductor.