Stihl HL 56 K (0°) Extended Hedge Trimmer Double-Sided 27.2cc EngineStihl HL 56 K (0) Extended Hedge Trimmer Double Sided 27. 2cc Engine The STIHL HL 56 K (0) provides homeowners with the reach typically featured on professional units. Its 26 inch shaft makes this extended length hedge trimmer great for homeowners and beginning landscapers. With its low emission, powerful two stroke engine, the HL 56 K (0) is fuel efficient for a lower cost of ownership over time. It features a lighter gearbox than previous models,