The Nova S Bowl Rest is part of the Nova Modular Tool Rest System. the s-curve bowl rest is a perfect fit for almost any size of lathe. The double curve provides excellent versatility for many different sized bowl turnings. The rest is radiused on the top and bottom edges for smooth movement of the chisels and it can be used in either orientation for even greater versatility. The Tool rest bar requires one of the Nova Tool Rest Posts (sold separately).