This is made to accompany your grip guide (version A) to make sure that the guides do not wiggle as you install your grips. Place your grip guide on the bottom of the pommel and slide this over the top and lock it into place. This is spaced for 6 grips on The Empire Strikes Back or The Force Awakens lightsabers.
PLEASE NOTE: This is designed only to work with Grip Guide Version A for ESB/TFA lightsaber installs. Specifically it is designed for 12.75mm wide grips that are 90mm in length, such as Blast-Tech grips.