The box contains a Huijun Forearm Flexor (Model HJ-B008), a wrist and forearm strengthening device designed to develop grip strength, endurance, and muscle thickness in your lower arms. Similar versions of this fitness tool can be explored via online marketplaces such as Jumia Uganda.
How to Position and Use the Device
This device can be used in two different ways depending on whether you want to target your forearm flexors (inner forearm) or forearm extensors (outer forearm).