The ah720 hedge trimmer attaches to your attachment-capable string trimmer with no tools. With dual action blades and an articulating head for easy reach, this trimmer lets you easily maintain your hedges. Application: trimming lawn hedges. Advantages: articulating blade adjusts from 0 - 75 degrees for greater versatility.full metal case construction for heavy duty use blade: 20" double-sided blades that will cut in both directions.