<http://schema.org/description>
"&lt;p&gt;A spot drill has a 90-degree point angle, which makes it easy to calculate the depth of a hole to be spot-drilled.  You simply divide the diameter of the spot-drilled hole. &lt;/p&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mmsonline.com/columns/dealing-with-a-spot-drills-true-point-position>