Rosen Screw Multi-Unit System Screw, 1.4 mm, 50/Pk. Direct connection to MUA (compatible with Nobel). Works on all materials. Screw channel never breaks. No TI-base needed due to the geometry of the screw head, has a potential of de-bonding and loosening of the prosthesis. Simple & reliable. The digital Libraries of the screw allow direct connection of the prosthesis to the MUA. Can be tourqe by hand only. Can be tourqe up to 20N with any material like Resim, PMMA, Graphite, and Zirkonia.