Made of 2 mm Titanium Wire, light weight and resists to high temperature. The holders comes in set of 3 in 3 difference sizes:
These holders need to work with a 3rd Hand which is not included in the set.
Simply mount the appropriate size Holder vertically with a 3rd Hand and place it over the pieces with gentle pressure, this will prevent them from moving when soldering. Additional holder may be needed for bigger area.
The rectangular shape is great for holding down ring shanks on soldering. Turn the holder 90 degree to accommodate the size of the ring.