Implantable stimulator

A medical kit, comprising:

• an insertion tool including a lumen with a partially cylindrical surface extending therethrough;
• an elongated implantable stimulator comprising an electronic module configured to generate stimulation energy suitable for stimulating tissue and an elongated implantable housing enclosing the electronic module, the housing including a partially cylindrical longitudinal surface and a substantially flat longitudinal surface opposing the partially cylindrical longitudinal surface, and
• an elongated surgical tool including a substantially flat surface;
• wherein the implantable stimulator and the surgical tool are configured for being inserted into the lumen of the insertion tool together, such that the partially cylindrical surface of the stimulator is adjacent the partially cylindrical surface of the lumen, and the substantially flat surface of the implantable stimulator housing is adjacent the substantially flat surface of the surgical tool.