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This Handle (one of the central pieces of a lightsaber) is made to connect with the other modular lightsaber pieces that you will find in my shop. This part, like my other modular lightsaber parts, is sized to accept a small flashlight inside like the one found here: https://www.harborfreight.com/3-12-in-Mini-Flashlight-69111.html
This Handle is uniquely designed to have an open lattice to make the internal socket of the lightsaber body visible. I specifically designed this handle to hold the Kyber Crystal here: