OT Strategy Plastic positioner to aid placenta of stainless steel housings prior to soldering. OT Strategy are precision attachments. It is important that the spheres are mounted in parallel to determine the greatest extent of correct function of the unit. These attachments are the only ones of this type to have a (patented) parallel support under the sphere that automatically aligns the retentive caps, an important factor for the insertion of the prosthesis. It will determine the duration of the caps and prevent the risk of wear to the spheres.