The sprinkler donut sod cutter is engineered to remove sod in a precise 7 in. circle around spray head sprinklers. The reduces the likelihood of grass growing into sprinkler heads or over them in a way that may block the spray pattern and reduce uniformity. The cutter is constructed from steel and has a sturdy tee-shape 26-in. handle and a 2-3/8-in. deep serrated blade which creates a clean cut in the sod. A typical companion part for the sod cutter is a sprinkler donut (sold separately) which fills in the circle made by the cutter ring around sprinkler heads. Compatible with spray head sprinklers from Orbit, Hydro-Rain and other major brands. For outdoor irrigation use with cold water only.