Curved ball burnisher. Extended shank ball burnisher with dark XTS coating for enhanced precision and visibility in deep Class II box situations (2.0mm and 1.4mm). 1 per package StyleSkulpt. 3 XTS Curved Ball. Burnisher. Hu-Friedy. Extended shank ball burnisher with dark XTS coating for enhanced precision and visibility in deep Class II box situations (2.0mm and 1.4mm).