From our friends at Techniks ...
Understand what causes wear on toolholders and what to do about it. Download this FREE 5-page guide!
http://www.techniksusa.com/downloads/Holder_Maintenance.pdf
Learn how to inspect and test toolholders for wear and concentricity (3:00 video):
http://www.youtube.com/watch?v=SyKMDVWX9w4