Expands the size range capacity of a 1/2" portable drill chuck.  Common flute and overall length for minimal adjustment during tool changes.  Precision ground for a high degree of concentricity between shank and body diameter.  Ideal for drilling low and medium tensil strength materials.

Packaging : All sizes are individually packaged.

http://www.pentecinc.com/comersus6f/store/catalog/2003-036.pdf