They simply keep the string from rseonating to give you a quick dead thump. I've found that using flatwounds w/ the mutes make for the closet thing to an upright you can get.
Can you buy em seperately?
My Sterling does have a String muter bridge but no string muters.
Only a piece that "protects" the bridge when the muters are not on the bridge ...
This topic was covered recently. Check out Rod Trussbroken's post - he gives an excellent tutorial at making mutes with... a mouse pad! Bery cool, I must say.
Well ... yeah ... don't have the screws and stuff and so on ... so ...
hm ...
read there that you can't buy em anymore...
Maybe I can buy em from someone who have those muters but doesnt use em eh ?!
start by asking at your local guitarstore no?