Flexi-Overdenture 12 Posts Stainless Steel Introductory Kit: 12 Overdenture Posts (6 of each size #1 and #2), 12 Nylon Attachment Caps, 12 Rubber Bands, 2 Primary Reamers, 2 Countersink Drills, 1 Wrench, 1 Depth Gauge and 5 Gates Glidden Drills. Flexi-Overdenture has a unique split shank of the Flexi-Post, with a ball and socket attachment for the highest retention and ideal distribution of stress. Introductory 12 post kit