Set of 6 Graph Tech String Saver Saddles to fit Wilkinson tremolos, you get a pair of each of the 3 heights used on the tremolo. The String Saver material is impregnated with PTFE for permanent lubrication and so strings don't bind in their slots during bending or tremolo use, improving tuning stability and reducing string breakage and the block design is comfortable on the hand while playing.