It always points in the same direction, but has no legs of its own. What is it?

I have two blades and cut paper or string. What am I? Solve the riddle → I bring two sides together, with a sound and a pull. I keep your jacket snug around you. Solve the riddle → It goes up and down but never moves forward. What is it? Solve the riddle → Without me, letters are just a silent row. Solve the riddle → I am flat and white. You can draw all the colors of the rainbow on me. What am I? Solve the riddle →