This is a saber plug,suit for 1 inch diameter saber hilt, only for baselit version.
Usage:
If you don't want to attach a blade to your lightsaber handle but you need to play or test it, a saber plug can help you display the test results and protect the eyes of you and others around you from the lightsaber's strong light.
And if you want to just show the handle first, attaching a saber plug will also effectively prevent dust from getting into the lightsaber emitter.
Package include: 1 piece saber plug
