Perfect on my lively metal snares, this removes all overtones, reduces the pitch of the drum, and gives that classic fat and thick snare familiar from those 70's recordings.
Good quality and has a nice weight to it, so no risk of it somehow coming off the drum in use.
This is the "donut" version, meaning it has a hole of several inches in the center, so it doesn't interfere with how your sticks feel on the drumhead.
Would buy again if needed. Fantastic!