Manufacturers > Drum Os
Drum Os HSC Drum Head Hole Cutter
Cuts a perfect hole in a drumhead every time. Adjustable from 2 in. to 10 in.
Drum Os Drum Hole Reinforcement
When it comes to venting and porting, Drum Os gives you plenty of options. It's easy to get creative with Drum Os because there are endless design possibilities. The sky is the limit! O's allow for ventilation as well as convenient external microphone access.