- Repair and string replacement aid for floating guitar bridges: simplifies replacing broken tremolo strings with less risk of slipping or mishandling. - Compatibility and fit: wedges fit both 6-string tremolo and 7-string tremolo bridges. Use the edge side of 2mm or 4mm depending on your guitar. - Protects the guitar finish: no dents and scratches during tremolo part replacement, helping keep your guitar looking and performing well. - Easy alignment: to adjust or remove strings, press the rod once and slide the string changer under the bridge for quick, accurate alignment. - Practical use scenarios: - Replacing broken tremolo strings on a floating bridge guitar (6-string). - Replacing strings on a 7-string tremolo guitar. - Routine maintenance or setup during gigs or studio sessions to minimize finish damage and handling risk.