What is this?These brushes are great for all the small nooks and crannies that you need to clean! Great for keyboard, electric shaver, window track, vent outlet, home, office, etc. The small narrow brushes help clean the coffee grind around the machine.What will I get?The cleaning brushes we provide here are in the size of Big Brush Total Length: 110mm / 4.33 inch; Small Brush Total Length: 84mm / 3.31 inch; Big Brush Bristles Length: 20mm / 0.79 inch; Small Brush Bristles Length: 16mm / 0.63 inchIn the package of 3pcs x Big Cleaning Brushes; 3pcs x Small Cleaning BrushesAre there any advantages of the product?The handle is made of plastic, comes with a nylon bristle. It can get into hard to clean places like under knobs, faucets.How to use it?They are tiny and easy to use. They can get into tight spaces that a larger brush cannot.What should  I notice?We recommend you gather the dust together and then use a dust collector to suck the dust away.