Bridge pins are normally comes with the guitar, mostly in plastic. It used to hold the string in place at the bridge. For improving the guitar’s tone, other material of bridge pins can be used, such as Bone, Ebony, Fossilized Walrus Ivory (FWI), Mammoth Ivory, Walrus Jawbone, and Buffalo Horn. You can always get affordable bridge pins at Musicians Friend, from as low as $3.59. Try to change the bridge pins and you will notice the big difference.