Play your best game every game when you use Slydart, the original self-contained dart sharpening device. This handy sharpener is easy to operate: press the button to start the Slydart and then just insert your dart tip in either hole on top of the Slydart. Just a little pressure and a few seconds are needed to sharpen in order to debur the dart tip. The two holes each have a different degree of angle so that you can choose the angle you prefer: Left angle - 15 degrees and Right angle - 25 degrees. Slydart measures 5.25" x .5" and requires two E90 batteries which are included. Proper maintenance of your darts with the Slydart dart sharpener will help make your best game every game.