Eyegor said:As has been stated before, traffic stops very rarely raise to the level of a consent search. However, if I asked an individual if they are carrying any weapons, received a negative response, and then found a knife or multiples there of I would not be happy. Although I agree with the "It's a tool" line of thought, the intention of the question is clear. Maybe that's why my line is usually something like "Do you have any weapons, guns, knives, needles, grenades, ballistic missiles?" The last often draws a smile and puts people at ease. Or I'll use "Is there anything in your pocket that might hurt me?" That line only gets used when a frisk is definitely on the way.
These are only my personal style. Nothing more.
Covering all the possible things a person might be carrying has got to be the best policy. That way a person's interpretation won't be mistaken for an attempt to conceal something or the other way around.
I've heard LEO's list over the top items like your "grenades and ballistic missiles" and look at their reactions; If they fail to smile or laugh, they tend to be hiding something.