Lego and Robots are a very popular genre of Lego MOCs. This robot duo are known as the Bad Binary Bitches (that is some good alliteration). Check out their use of various clips and hinges. They are also a great place to show off new and cutting edge Lego building techniques. Especially the use of the Lego Minifigure back connector used in the legs. The use of stickers (custom!) help lend these robot ladies some personality. They may be tough, but they certainly look delicate. They are standing on Lego wrenches after all.
Check out the “Bad Binary Bitches” created by Andrew Lee over on Flickr: https://www.flickr.com/photos/wintermute2600/15600388753/