a good spring tool would be the power water washer, good for cleaning the siding, cleaning the deck, cleaning the side walk and driveway and then the car. Power washers are a very versitle use tool.
Then you have your lawn mower, but I do not think you are considering this tool
If power tools, the most used one would be the power screw driver. Used for about every project there is, from driving screws to drilling holes.
Others will chip in also for you.
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