- MPF zir grip Tweezers have been designed to work with all kinds of ceramic & zirconia restorations in mind, these ergonomically designed tweezers boast tips made from sintered zirconia and are shaped in such a way to assist the ceramist when positioning his crowns, veneers and small bridges onto the refractory pins before firing. - These tips being from zirconia avoid leaving any dark marks that the current metallic tweezers create. **For further product information, please contact Chat Support**