The Pearl SR-500 Triad Snare Strainer Assembly includes both the silent throw and butt plate normally found on Philharmonic concert snare drums - though you can certainly install it on whatever drum you wish!
Three individual snare adjusters allow you to modify the tension of three different sets of wires, while the global tension adjustment on the butt plate tightens or loosens all three for quick changes.
This product does not include any snare wires.