The Troy-Bilt Spring-Assist 1-blade edger from MTD has a 30cc, 4-cycle Troy-Bilt engine that requires no mixing of gas and oil. With the Spring-Assist starting technology, it’s easy to start and use. The heavy-duty 9” dual-tipped steel blade cuts a clean edge along driveways and sidewalks. It has a 1.75” edging depth and three premium transport wheels.