The Rotary Locking Clip is an interlock system designed for corrugated packaging, point of sale, and industrial applications. This clip is inserted into box walls from the outside of a corrugated board via a simple die cut, then turns and locks into place. It joins two pieces of corrugated cardboard together and makes closing and reopening the package a breeze. The clip is 100% reusable and it can be easily assembled and removed in a few seconds; no additional fixings or tools are required.