OSS "FRISK " KNIFE.. Small, thin, double edge blade with a non reflective finish Page 20 of OSS WEAPONS by Keith Melton. The Frisk Knife is designed to be taped flat against the upper arm or lower leg so that it will be over-looked in a preliminary "Frisk" or body search. The double-edged blade is intended for use as a emergency weapon at close range. The knife maybe thrown, or wielded with a slashing or jabbing movement to the expose or vital points of the Anatomy. The weapon can be very effective when used decisively against an unsuspecting opponent. Length- 7 3/8" Width- 7/8" Thickness - 3/16"