Regular electric receptacle question [View all]

Replacing a regular electrical receptacle, you know the kind that has a little face for 2 things to plug in. The one I'm removing has a strange connection - the wires just insert into the back and you remove it by poking a small screwdriver into a hole next to the hole that the wire goes into. There are no screws that you wrap the wires around. I have often seen speaker boxes that are connected sort of like this.

I am not at home and I do not have my passwords for my photo account so I can't post a picture unless I email it to somebody.

My question is do they still make electrical connectors like this or do I have to get the kind that has the screws on the side? The box that this fits into is a little small and I'm concerned the regular style receptacle with the screws on the side may not fit. I guess they're cheap enough I can just get one and try it.