"Ryobi's 40V Brushless 9"" Edger kit is a powerful and versatile edging machine with a steel blade that is tough and strong. It comes with a 4-position setting and a variable blade speed slider, and is easy to use with a hex key provided with the instructions. The kit also includes a 4-year warranty and a safety switch. The machine is well-built and can be used in a variety of situations, from trimming hedges to edging dense grass and roots."