Pandahall 100PCS Golden Brass Wire Guardian Jewelry (4x5x1mm) Size: about 4mm wide, 5mm long, 1mm thick; hole: 0.5mm Metal Color: Golden; Material: Brass; Usage: Terminators; Wire Guardian and Protectors Unique Design: Curved U shape design protects your wire from abrasion effectively. Wide Application: Perfect for handmade handcraft works, necklace bracelet, sweater chain, anklet, jewelry DIY accessories, etc. Easy to Use: simply put your crimp on your Tiger tail first then feed your wire up one side of the guardian, then down the other side and back through your crimps. Pull your crimps up and squash as normal.