These locking head and shank tweezers are specially designed to hold ring shanks and settings together with no-slip accuracy so that they can be soldered. The shank fits into the curved lower jaw of the tweezers and the flat, serrated upper pad holds the setting in place; a slide-lock mechanism then exerts precise, steady pressure to hold the assembly together. Satin-finished stainless steel is sturdy and rust-resistant, providing a good tool life and good value.