CANOPUS BT-20 [Bolt Tight / 20 pieces] SONOR The diaphragm's tone is open

The diaphragm's tone is open and wide

"They're easy to install

where reliability is paramount

2002: Novo China 18-inch

hold the disc-shaped end

CANOPUS BT-20 [Bolt Tight / 20 pieces] SONOR The diaphragm's tone is openBolt Tight [Leather washers for attaching to drum tuning bolts] "They're easy to install, the bolts lock in exactly where you want them to, and they don't loosen easily. They also cut out the overtones in the drum, making the drum sound fatter, and are inexpensive and durable." Bolt Tight is the answer to such drummers' requests. It has received overwhelming support from drummers, drum techs, and rental companies alike. You won't understand its great