The CA PRIMA is an entirely re-engineered 1:1 contra-angle attachment, built using stainless steel for greater resistance to mechanical impact and extended service life with the guaranteed reliability of the Accu-chuck advanced system that reduces vibrations. The reinvented contra-angle improves visibility and working precision with a newly tapered head, while an external irrigation line keeps working areas clear and cool for 1:1 direct drive surgical applications. For all slow speed restorative and surgical work, from 100-40,000 RPM. Non-Latex Shelf Life : 3650 days