VHC, Variable Hilt Component, is standard threading system used among sabers that allows the exchange of parts. Saber components of this system generally exhibit a structure composed of four elements:  Emitters, Switchs, Grips, and Pommels. These mystery boxes provide all the components to build 4 complete VHC lightsabers including cores, blades, covertec wheels, and belt clips. Colors, style of components, and blade lengths vary. Cores vary based on the mystery box chosen.