Quote:
Originally Posted by Seginaway
T4 seemed like the best fit, but it didn't seat sufficiently to remove the screws. Because of the "concave" nature of the screw, it did not dig down deep enough to interact with the grooves.
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Could you describe "concave" a bit better?
Webster's defines concave as "having a shape like the inside of a bowl : curving inward"
I have seen torx screws with a protrusion in the center cavity - that requires the screwdriver to actually have a cylindrical hole (i.e., the screwdriver looks like a hollow tube).
These are described as "tamper proof torx"
See for instance
http://www.amazon.com/Anytime-Tools-.../dp/B000FIXXBA
Home Depot has several selections.
http://www.homedepot.com/s/tamper+proof+torx?NCNI-5
Caution: sometimes these tamper resistant screws (particularly in larger sizes) are 5-point instead of 6-point.