1/2 Allen Orban Knife Round 1/2 Allen Orban Knife Round KO12KPO3AR 30% thinner than the standard Orban, features a rounded angled blade and contra-angled shank for posterior use. Also useful for excising interproximal tissue. Where to Buy x Category Dealer PartnersSales RepresentativeStrategic MarketsSchools RepresentativeAccutron™ Equipment Sales Zip Code Find RepresentativeReset Select a category, input a zip code and click on Find Representative, or explore the complete list here.