2-1/4" stone holders are spring-loaded with contracting wire 4-prong jaws for examining gemstones or other small items.
Find this tool at: http://www.jewelrytools.com/eurotool/additional-stone-setting-tools/Mini-Stone-Holder-4-Prong-Jaws-2-1-4-Inches.html
Find more at http://www.jewelrytools.com
