From DW:
DW’s quick-release cymbal stand wing nut has been in development for quite some time. The spring-loaded mechanism is smooth and precise, allowing drummers to either thread their cymbals on in the traditional manner, or skip the process with a pinch of their thumb and forefinger. The QR Wing Nut (DWSM2346) includes an integrated top cymbal felt with nylon washer and is sold as a DW Factory Accessory 2-pack that fits all DW cymbal stands with an adjustable cymbal seat.