The Graph Tech TUSQ Martin Style Compensated Acoustic Saddle is a great option to replace or upgrade Martin or similar size acoustic guitar saddles, it is fully compensated to help improve intonation. Their TUSQ material is efficient at transferring vibrations to your guitar top and delivers a rich tone with crystal clear bell like high-end with big open lows and increased sustain, as a man-made material it is consistent from piece to piece with no hidden soft spots associated with bone. Graph Tech saddles are supplied slightly oversized to allow for final fit and shaping (material works easily with fine sandpaper).