The mountfield s421r pd is a self propelled rear roller rotary mower ideal for those classic lawn stripes the robust powder coated steel chassis ensures this quality lawn mower will deliver a superb finish for many years powered by an easy start 100cc mountfield rs 100 ohv 4 stroke engine and with forward drive coming from the powered rear roller this mower is effortless to use and cuts right up to paths and border edges 5 heights of cut ranging from 20mm to 70mm selected using a single