A lawn edger/trencher is a handy tool to have in your gardening arsenal, and is designed to give you the best of both worlds — trim the grass on the very edge of your lawn, and cut trenches, so that you can mow along the edge to prevent damage to your mower caused by rocks or bricks.
Many homeowners, especially those who already own an edger often use it as a trencher too. But using an edger as a trencher does not offer the same operational efficiency, because the depth will be limited, resulting in a longer time to dig trenches.
