I've used many differnet ones over the decades including numerous Black and Deckers of various vintages, Deltas, Millwukee, ShopMate and other builder supply private brands, Hitachi, etc
They are OK for what they are made for - freehand cuts in thin materials. Trim work mostly - or "hobby" or "craft" work - not construction. Detail work - or "nibbling"
Anyone working with "pallet wood" unless they are going to discard the good heavy framing of the pallet (which "I" find usefull - - - - -
By 4 incher I was referring to a 4 inch cut in 2 inch rough lumber - like a 2X4 The parts of the pallet you would use as the corner posts of a compost bin being made of "pallet wood"