DO NOT BUY OR MAKE A CHIANSAW IN A TIN - THEY SUCK! I got one thinking it would be quick and silent. Wrong! For a start you are removing a large slice of wood for nothing, my chainsaw in a tin is 6mm wide, that's a lot of wood to remove in a cut. They take way, way, more energy than a normal saw. They are NO substitute for a good saw, way inferior, a bit of a gimmick. Advertised a survival tool - you expend so much energy using it to cut wood you would be better off not using it at all. IMHO