Yes, and the one configured as fail secure is probably the most popular. When power fails, it automatically locks: applying the 12V power opens the strike.
The only downside is installation cost? isn't it a job for a locksmith to install, especially when your existing strike faceplace is metal. Also, you'd need some power hooked up to it, on the inside of your door frame.
Assuming your door has a traditional door knob & lock fitted as well, an electric strike doesn't prevent you opening the door when its in the locked position. The way an electric strike unlocks a door is by swivelling a part of the strike plate away. When its 'locked' its really just like a regular door with a fixed strike plate, as per this diagram ... http://www.hometips.com/wp-content/uploads/2012/06/doorknob_...
The only downside is installation cost? isn't it a job for a locksmith to install, especially when your existing strike faceplace is metal. Also, you'd need some power hooked up to it, on the inside of your door frame.
I have this one, which I bought from a local electronics supplier - AU $29.95 - http://www.jaycar.com.au/productView.asp?ID=LA5077