This duster is by far the best and most durable on the market. Excellent for spreading powder materials such as rotenone, pyrethrin, sulfur, diatomaceous earth, etc., it will not only save you time, but also save on materials. Using a Dustin Mizer, 1 pound of diatomaceous earth can tcover up to 1000 square feet of yard and garden. The unit we offer includes a special directional scoop to get where the bugs hang - the undersides of leaves . This is the best tool of its kind.