Ceramic retention boxes

These ceramic retention balls for folding knife are packed in bags of 20 and 50 pieces. They are for use in the manufacture of folding knives such as liner lock, frame lock and liner lock. They keep the blade in a closed position without any play, and reduce the friction surfaces between the plates and the blade when opening the folding knife. Ceramics, compared to stainless steel, provide less friction between the parts and a more fluid movement.