<http://schema.org/description>
"This footage illustrates how the toolholder taper is measured in a test designed to capture the retention knob\u2019s effect on the shape of the toolholder taper."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mmsonline.com/videos/retention-knob-tightening-and-toolholder-deflection>