stupid question about school supplies

<p>anyone use these expanding file things? they always seemed practical to me.</p>

<p><a href=“http://www.staples.com/sbd/img/cat/enl/s0112190_enl.jpg[/url]”>http://www.staples.com/sbd/img/cat/enl/s0112190_enl.jpg&lt;/a&gt;
<a href=“http://www.officedepot.com/pictures/SK/MD/476536_sk_md.jpg[/url]”>http://www.officedepot.com/pictures/SK/MD/476536_sk_md.jpg&lt;/a&gt;&lt;/p&gt;

<p>are they handy?</p>