Briggs & Stratton Quantum XTS 50 Power engine for reliability and easy starting, 48cm width of cut Strong aluminium deck for durability.Front fins on deck noticeably improves the quality of cut that can be obtained ,7 cutting heights ranging from 13 - 65mm adjusted by a single lever .Operator Presence Control safety mechanism incorporated snugly into the handlebar which, when released, stops the mower completely .A cutterbar friction disc is fitted which protects the engine crankshaft from bending. This disc is unique to Hayter and limits impact damage should you accidentally hit a solid object and thereby qualifies for a lifetime guarantee against engine crankshaft bending .