LAGUNA ALAREVO1216 EXTENSION20 - REVO 12|16: 20" Extension20" Steel Extension comes packed with Cast Iron swing banjo extension and assorted hardware. It can mount in 5 different positions including perpendicular to Headstock to allow better access. The lathe features forward and reverse spindle rotation as well as a double threaded 1x8TPI spindle that allows the user to turn on both sides of the lathe. With the expansion set (ALAREVO1216 Extension) the turner can choose to extend the center to center