Well, if you're in a pinch and the blade on one of your most essential garden tools has become as dull as a butter knife, try using an angle grinder to sharpen it instead. If you spend a lot of time gardening, you know that some garden tools should be sharpened regularly to prevent hand fatigue and make cleaner cuts. This method is worth considering if you'd rather spend your time gardening than wrestling with dull tools. If you don't already have an angle grinder, don't fret. For example, the DEWALT 4-1/2 -Inch Angle Grinder is available on Amazon at this price.