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.
Move the incense upwards, then suddenly jerk downwards, then repeat. You can launch fast smoke-rings through the center of slow ones, create side-by side rows, etc. In a draft-free room they persist for ages, and soon the air will be full of huge grey thin circles. Contemplate the silent Chaos.