Signature Series™ Cassette Orthodontic Replacement Latches, 2 Pack Signature Series™ Cassette Orthodontic Replacement Latches, 2 Pack LT-OR Signature Series Cassette Replacement Latches, 2 pack. 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.