so im looking at http://www3.towerhobbies.com/cgi-bin...LXAYPF&P=M

now im alittle confused i know 5/64 and 2.0mm are not 100% the same size. im woundering if this would round out my 2.0mm screws/ tip faster then a normal 2.0mm bit

If you read the description, it says it fits the 5/64 driver handle, not 5/64 hardware. It's for 2.0mm only screws.

this same part number http://www.teamassociated.com/parts/details/1659/

they read 5/64 tip

<h2 style="font-size:138%" class="r"> (5/64") 0.078125 inch = 1.984375 millimeters</h2>