<p>Alm Retractors have a thumbscrew that opens and lock the arms into the right place. The arms have outward curving prongs to hold the soft tissues securely. These dental instruments are:<br />
&bull;&nbsp;&nbsp; &nbsp;Overall length 3 &frac34;&quot;<br />
&bull;&nbsp;&nbsp; &nbsp;Sharp prongs<br />
&bull;&nbsp;&nbsp; &nbsp;Premium Grade<br />
&bull;&nbsp;&nbsp; &nbsp;Reusable</p>