Diamond Articulators are the fastest, most accurate and durable dental model system available. ┬áPatent pending features allow easy separation of upper and lower trays, easy pin placement guide and engineered pins and pin holes to maximize die stability. Each box of 50 complete Diamond Articulators come pre-assembled and ready to use. Each Box includes 5 posterior stop rods. Pins sold separately. Buy now at BDIart.com. ┬áSearch “Diamond Articulator” on YouTube for how to videos.