These rings are made from Honduras Mahogany and are flat.  They are best suited for guitars with
a tremolo and they are excellent for guitars with a mahogany body.  The grain is currently being cut with a horizontal grain orient for strength and stability. 

Mahogany is used on many electric guitars for the prime material.  These sets can be stained to match by you.  Genuine South American mahogany is used and you will love the look on your guitar!!