The benefits of using crystal drawer knobs are that they add a touch of elegance to any room and are a popular and affordable way to decorate a space. The advantages of the 25mm length screws are that they are long enough to attach the knobs securely to the drawer or furniture. The benefits of the sparkling appearance of the knobs in the light are that they add a touch of elegance to any room and make the knobs a popular and affordable way to decorate a space.