Cuts circles from 1 7/8'' to 8 1/2''. Innovative, ratchet mechanism is efficient and easy to use No more dragging the blade through bunched fabric or dealing with time consumi.
This means that smoke emitted from the incense will set off a smoke alarm when in range of the detector.
Interesting question. I know a building where the smoke alarms are so sensitive that even aerosol deodorants set off the alarms! However, the fumes from insense cones should not affect the smoke alarm, providing they are burning slowly.