These 5.75 inch (146.05 mm) tweezers feature a specialized jaw design for holding jewelry "heads" (settings) and shanks together during the soldering process. The cross-locking mechanism ensures that the two components stay perfectly aligned under the heat of the torch, preventing "shifting" and ensuring a symmetrical final product. They are crafted from high-temperature stainless steel for long-term durability. These tweezers are a critical tool for the assembly of multi-part jewelry, such as engagement rings and complex pendants, where precise alignment is paramount.