Diamond Bridge Beads for Classical Guitar & Nylon String Guitar -Guitar String Ties CAD Designed, Laser Sintered Nylon for Flexible Strength Lightweight but strong. Less than 1 gram per bead! Uniform size with rounded edges for better long term string performance Works like an 18 hole Bridge to securely hold strings in place. Provides Uniform string angle at Bridge. No string wear on top of bridge inlays!