A locking system for a spool comprising: a barrel comprising a first longitudinal end and a second longitudinal end, wherein at least the first longitudinal end comprises at least one barrel detent; a first flange removably affixable to the first longitudinal end of the barrel, wherein the first flange comprises at least one receiving location for a sliding lock, the receiving location comprising: at least one flange detent, wherein the at least one flange detent is aligned with the at least one barrel detent to form at least one track; and at least one sidewall having at least one recessed portion; and a sliding lock comprising: a body portion comprising a proximate end, a distal end, two sides, an outer surface and an inner surface; at least one rail disposed on the inner surface of the body portion, wherein the at least one rail is slidable in the at least one track; at least one flexible arm, wherein the at least one arm initiates near the proximate end of the body portion and extends adjacent to one of the sides of the body portion, toward the distal end of the body portion; at least one catch disposed on the at least one arm, wherein the catch is configured to slidably move into the at least one recessed portion of the flange receiving location and is restricted from moving out of the at least one recessed portion; a retaining portion extending from the distal end of the sliding lock, opposite the proximate end, wherein the retaining portion is configured to snap-fit onto a portion of a rib of the flange; and a lip extending from the proximate end of the sliding lock, opposite the distal end, wherein the lip is configured to engage with the flange within the receiving location. a barrel comprising a first longitudinal end and a second longitudinal end, wherein at least the first longitudinal end comprises at least one barrel detent; a first flange removably affixable to the first longitudinal end of the barrel, wherein the first flange comprises at least one receiving location for a sliding lock, the receiving location comprising: at least one flange detent, wherein the at least one flange detent is aligned with the at least one barrel detent to form at least one track; and at least one sidewall having at least one recessed portion; and at least one flange detent, wherein the at least one flange detent is aligned with the at least one barrel detent to form at least one track; and at least one sidewall having at least one recessed portion; and a sliding lock comprising: a body portion comprising a proximate end, a distal end, two sides, an outer surface and an inner surface; at least one rail disposed on the inner surface of the body portion, wherein the at least one rail is slidable in the at least one track; at least one flexible arm, wherein the at least one arm initiates near the proximate end of the body portion and extends adjacent to one of the sides of the body portion, toward the distal end of the body portion; at least one catch disposed on the at least one arm, wherein the catch is configured to slidably move into the at least one recessed portion of the flange receiving location and is restricted from moving out of the at least one recessed portion; a retaining portion extending from the distal end of the sliding lock, opposite the proximate end, wherein the retaining portion is configured to snap-fit onto a portion of a rib of the flange; and a lip extending from the proximate end of the sliding lock, opposite the distal end, wherein the lip is configured to engage with the flange within the receiving location. a body portion comprising a proximate end, a distal end, two sides, an outer surface and an inner surface; at least one rail disposed on the inner surface of the body portion, wherein the at least one rail is slidable in the at least one track; at least one flexible arm, wherein the at least one arm initiates near the proximate end of the body portion and extends adjacent to one of the sides of the body portion, toward the distal end of the body portion; at least one catch disposed on the at least one arm, wherein the catch is configured to slidably move into the at least one recessed portion of the flange receiving location and is restricted from moving out of the at least one recessed portion; a retaining portion extending from the distal end of the sliding lock, opposite the proximate end, wherein the retaining portion is configured to snap-fit onto a portion of a rib of the flange; and a lip extending from the proximate end of the sliding lock, opposite the distal end, wherein the lip is configured to engage with the flange within the receiving location.