Screw chuck.
You can also make one with a faceplate.
Screw wood to faceplate, turn wood down to your desired profile. Once complete drill hole in center and place the screw in the center. I counter sink the head on the back side and fill around the head with epoxy. The threaded part will stick out the wood opposite of the head stock. Then just thread blank on the screw.
The second photo is a bottle stopper chuck. I dont like this way but inexpensive. Got me by a lil while when first getting started.
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