WC lock opener

WC locks commonly have a turning knob on the inside and a square hole on the outside like shown in [this picture](http://www.lukuexpert.ee/bw_client_files/lukuexpert/public/shop_product_picture/magick.php/541_turning-knob_wc-vaantonuppi_wc-lukusti-ab001wc-1399135847.jpg). Here is an another [example](http://www.turunlukko.fi/media/tiedostot/tuotekuvat/abloy-lukot-ja-helat/avainkilvet-ja-wc-lukitus/wc-lukitus/cache/avainkilvet_wc_lh0340_jva-800x700.jpg). This design is a handle that will open such door from the outside.