Diamond Articulators are fast and easy in the model room, but on the bench is where you will see all the benefits of this patented articulator. Solid model accurate contacts on this articulator will make checking the crown on solid models a thing of the past. The specially designed milled brass pin and base pinhole will hold the die tight, even if it is shimmed. No more dies or sections falling off the articulator. The patented hinge makes separating the upper and lower a snap. No more broken hinges. Pins are sold separately. You will need about 250 pins per 50 sets.