A gentleman that won my giveaway was located in Canada. I went to the post office usps filled out custom form. I was honest and wrote, 1 flashlight, 1 wallet ,and 1 small knife. Took it to the counter, and the lady said out loud, real loud , you can't ship a knife usps. I told her I could, she said no you can't, no sharp object.
Well I walked away and told her to have a great day.
What I find is the USPS site hard to navigate but after a half hour,I was able to find the a manual for postal employees in regards to mailing knives domestically within the US.In the publications section of the site,in Pub. 52 - "Hazardous, Restricted, and Perishable Mail",page 99 and page 115 in the pdf format.
http://pe.usps.gov/cpim/ftp/pubs/Pub52/pub52.pdf
Knives and Sharp Instruments
General
Sharp instruments include all sharp-pointed or sharp-edged implements
such as knives, tools, ice picks, razor blades, stilettos, or similar devices.
When uncertain about the mailability of
a sharp instrument or a switchblade
knife, a ruling may be requested from the local postmaster
Switchblade Knife
A switchblade knife has a blade that opens automatically by hand pressure
applied to a button or other device in the handle, or by operation of inertia,
gravity, or both.
Mailability
A switchblade knife, as defined in
441.2
, is mailable only to the following
categories of addressees:
a. Certain designated supply or procurement officers and employees
ordering, procuring, or purchasing them for use in connection with their
respective governments or organizations, such as:
(1) Civilian or armed forces suppl
y or procurement officers, and
employees of the federal government.
(2) Supply or procurement officers of the National Guard, the Air
National Guard, or the militia of a
state, territory, or
the District of
Columbia.
(3) Supply or procurement officers or employees of the municipal
government of the District of Columbia, or of the government of
any state or territory, or of any county, city, or other political
subdivision of a state or territory.
Note:
Addressee Identification. Before delivering a shipment (or
parcel) that contains an article or articles described in
441.2
, a
USPS employee may require that the recipient identify himself or
herself as being in one of the categories in
442
a
.
b. Manufacturers or bona fide dealers of such knives in connection with a
shipment made to an address in one of the above categories.
Packaging and Marking
General
All sharp-pointed or sharp-edged instruments such as knives, tools, ice
picks, razor blades, etc., that are otherwise mailable, must be securely
packaged in a strong container. An inner and outer packaging container is
recommended. Sufficient cushioning material must be used to protect the
sharp points and edges from cutting through the outer packaging during
normal Postal Service handling.
Marking
No marking of any kind that indicates the nature of the contents may be
placed on the outside of any mailpiece containing a switchblade knife