A 3d printable version of the lathe tool height setter gauge found at https://littlemachineshop.com

Quickly and easily check and adjust lathe tool bit height (adjust to center)
Accepts any diameter work piece from 1/8" to 2 1/2"
Use a rubber band in the small hole to achieve hands-free operation

Uses 7x26mm bubble level found here http://www.amazon.com/Inclinometer-Spirit-Level-Bubble-tube-Gradienter/dp/B00YJF8JRI/ref=sr_1_24?s=hi&srs=11406325011&ie=UTF8&qid=1462990638&sr=1-24