This 4-Jaw chuck is self centering with soft jaws mounted on the steel master jaws. It is 3 1/4″ in diameter and has a 22mm x 1.5mm thread. It fits on our ER16 spindle.
4 Jaw 3 1/4″ dia. self centering scroll chuck (steel body) with aluminum soft jaws 22mm x 1.5mm thread.