Material: Steel. The saddle is made of sreel to better protect the strings. Quality saddles hold your strings firmly. Easy to install onto guitar bridge. Genuine replacement saddles and inserts compatible with Floyd Rose FR Tremolo System. The tremolo bridge saddles help prevent string breakage, improve tone and sustain and keep your guitar in tune. Total 6pcs/set, including three kinds of height and each kind 2pcs, to meet your installation needs.