The Complete Lathe Tool Rest Arm with Locking Lever Upgrade Kit adjusts quickly and easily without the need for additional tools. This design allows you to adjust the position of your lathe tool rest on-the-fly as the turning profile changes. All adjustments are tool-free and allow for greater flexibility in positioning the tool rest exactly where you need it. The oversized locking levers make adjusting and securing the position of the tool rest a snap.