For installing fence posts or digging down for tree and shrub planting, post hole borers are very useful and usually quite expensive for a domestic user to buy.the sherpa 1 person post hole borer is a superb value, professional quality machine which includes 3 sized augers to get you started. The operating handles have been positioned for the best balance and control of the machine. The st gd520 is fitted with a powerful 52 cc two stroke petrol engine to drive the auger bits. Easily started with a smooth recoil starter the single cylinder engine is air cooled and will give you accurate, pro quality holes.the included drill bits are 4, 6 and 8 inches in size.featurestool kitfuel mixing bottletwo stroke engine oil100 mm 4” drill attachment150 mm 6” drill attachment200 mm 8” drill attachmentspecificationsengine single cylinder 52 cc two strokepower 1.55 kwdiaphragm carburettorfuel tank capacity 1200 ml manufacturer’s 12 month home owner warranty