Designed to safely reverse your hollow forms. The end is 2MT and simply fits direct into the headstock. Then reverse your hollow form by placing it over the hollow-form reversing tool. Bring up your tail-stock and apply enough pressure to securely hold hollow form. Then bring up the centralising cone and clamp down. These are brass tipped grub screws and wont mark the shaft. (tip unscrews and allows for your own wooden cone to be turned if a larger one is needed. Shaft is 19mm dia) You can then safely turn the bottom of your form! Recommended max RPM:1000. For hollow forms up-to 14" deep.