Abstract: A combination locking tube comprising a base end cap connected to a base tube having a longitudinal channel and at least one notch contiguous with the channel, at least one locking ring having a longitudinal ring channel, a notch contiguous with the ring channel and an interlocking pin, each locking ring rotatably mounted on the base tube such that the locking ring's notch is positioned over a base tube notch, at least one indicia ring rotatably mounted on a locking ring having a plurality of characters and a plurality of teeth on its outer and inner surfaces, respectively, at least one static ring statically mounted to the base tube having an interlocking pin receptacle and an annular recess, an inner tube having an end cap and at least one pin received within the base tube.