such to happen at the user 39 s discretion in the post use position shown in fig2 the needle assembly na v can be rendered un usable while being retained on the body 10 u2032 moreover it can also be removed by moving member 20 u2032 toward the body 10 u2032 although this is not recommended this embodiment allows for such to happen at the user 39 s discretion u2014 in case the user wishes to reuse the body 10 u2032 i e by installing another a new and or un used needle assembly na v fig2 show another non limiting embodiment of the device 1 v in this embodiment the needle assembly na vi is similar to that of fig2 but additionally utilizes the needle shield locking arrangement 65 u2033 67 u2033 shown in fig2 so as to provide a secondary and or back up and or redundant and or dual locking system the device body 10 u2032 is otherwise similar to that of fig2 27 and can be used in a similar manner fig2 31 show another non limiting embodiment of the device 1 vi in accordance with the invention in this embodiment the needle assembly na of fig1 is shown already installed on a device body 110 the body 110 utilizes.