16ER 18UN

Two brand new inserts.  
For 18 Thread per Inch UN 60 degree threads. Full Profile Cut.
 
   These are Sandvik R166 inserts, and will fit both standard ER16 and Sandvik R166 16mm Toolholders.
   Ref - ER16 = 3.5mm Thick x 4mm Hole - R166 4.1mm Thick x 4.3mm Hole.
   Picture #3 shows fitted to a ER16 Tool for conformation. 
 
   Top Quality Genuine Sandvik.