GRADE 5 TITANIUM (6AL4V): These S1 lanyard beads are manufactured from grade 5 (6Al-4V) Titanium and tumbled to a uniform, stonewashed finish and is extremely lightweight and durable. Titanium is an extremely tough material and will never rust or oxidize. C360 BRASS ½ HARDENED: These S1 lanyard beads are manufactured from (360 1/2 hard) Brass and tumbled to a uniform stonewashed finish and will develop a natural patina with age. TELLURIUM COPPER: These S1 lanyard beads are manufactured from tellurium copper and tumbled to a uniform stonewashed finish and will develop a natural patina with age. SQUARE DESIGN: Adds character to your keychain. Use it to create your own customized keychain with paracord lanyards for your gear, zipper pulls for your bags or backpacks, or use it to add some bling to your boring keychain! OUTSIDE DIMENSIONS: 0.315" [8.0 mm] square x 0.512" [13.0 mm] long HOLE SIZE: 0.197" [5.0 mm] diameter Designed in the style of our Pixel keychain flashlight, this lanyard bead has an unusual square profile to add a unique look to any of your items. Create paracord lanyards for your gear, zipper pulls for your bags or backpacks, or just add some bling to your boring keychain! These beads have a stonewashed tumbled finish, and is extremely lightweight and durable. Titanium is an extremely tough material and will never rust or oxidize. Brass and copper beads will develop a natural patina with age. About this item - 3-Pack of all metal precision lanyard beads - 1x C360 Brass ½ Hardened lanyard bead - 1x Tellurium Copper lanyard bead - 1x Grade 5 Titanium (6Al4V) lanyard bead - Custom-machined lanyard - keychain beads