The Mc Culloch PM55 Snow Blower is a compact, high capacity 2 stage model that is especially easy to use. It features a continuously variable transmission, high quality & relaible Briggs & Stratton 800 Snow Series engine as well as forward & reverse disc drive gears. It has a generous working width of 61cm. This PM55 snow blower has thick X-trac tyres for maximum grip, & the blower has sturdy back handles for a great grip & greater control when clearing away the snow. The Mc Culloch Two Stage Snow Blower PM55 has a two stage process, which means that there are two mechanisms to move the snow. The first being the auger which feeds up the snow, & the high speed impeller then blows the snow out of the engine.