Picasso is regarded as the leader in the manufacturing of tungsten products and developed the industries very first insert free/fray free weight over a decade ago.  Their proprietary polishing, coating and strict QC  processes are performed at their own facility located in the USA.  They are in absolute control of each and every step of the manufacturing process to assure the weight being packaged is fray free and meets their highest quality standards. Made in USA

Picasso Website