The base of the hook has a circular shape, allowing it to rotate continuously within the retainer. The strap of a backpack or cross-body bag fits through the hook's thin slot.

The retainer and hook combine with a "snap!" The button in the center acts as a release mechanism; press it down and pull on the hook to separate the two pieces.

The cloth of the bag is held between the metal backing plate and the retainer. Two screws puncture the fabric and anchor the parts to each other.

The current prototype, which is 3-D printed from laser-scintered nylon, holds 160 lbs before breaking.