In Saber Unbound , custom hilts are mainly for changing how your lightsaber looks and is styled rather than giving a clear gameplay power boost. Based on the available info, the hilt system is about mixing or swapping hilt parts to make a custom saber appearance.

What they seem to do

  • Let you equip a different hilt design.
  • Help you personalize your saber’s look.
  • In some saber systems generally, hilts are modular, meaning parts can be mixed and matched to create a unique build.

What they probably do not do

  • There’s no solid evidence here that custom hilts change damage, reach, or stats in Saber Unbound specifically.
  • The sources found focus on appearance and customization , not combat bonuses.

Quick read

If you just want the practical answer: custom hilts are cosmetic/customization items in Saber Unbound, so they make your saber look different and more unique, but they do not appear to be a major gameplay mechanic from the info available.

TL;DR: custom hilts = style and personalization, not confirmed power upgrades.