This Sabian XS hi hat BOTTOM ONLY is made from the classic "B20" bronze (80% copper, 20% tin, traces of silver). I made the two extra holes seen in the photos to help prevent "air lock" and these do not affect the sound or the integrity. No keyhole, only a few minor scratches and no excessive wear. It is probably 1300-1400 grams, on the medium-heavy side, so it easily pairs with a medium light to medium top cymbal.