44 Knives and Sharp Instruments

441 Definitions

441.1 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 (see 215.3).

441.2 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.