Treatment of severe or moderate Class II in adult patients using aligners requires sagittal movements for correction. Fortunately, extensive research has been conducted into this topic and the attachments commonly used for such treatment. The shape and position of the attachments influence the force applied to the teeth. This report presents a patient with a complete Class II division 2 bilateral molar and canine relationship where the treatment plan relied on the use of rectangular horizontal attachments on the molars to perform maxillary distalisation and mandibular mesialisation. After 22 months of aligner treatment, the desired results were achieved and the bilateral molar and canine relationship was corrected from Class II to Class I.