An instrument for inserting and removing a bone nail connected to a rod is provided. One fuel injection orifice which opens into the combustion chamber is provided correspondingly to the fuel injection valve and plural air injection orifices which open into the combustion chamber are provided correspondingly to the air injection valve. Between the ribs are passageways which can allow the flow of air along the outside of the cigarette into the mouth of the user, so that the volume of smoke breathed in by the user can be reduced. The no-pull module includes a strap for connecting a leash to the front leg straps. The programmable power adaptor optionally informs users of faults, proper device usage, andor provides database access.