crazy prison weapons made from everyday items

Materials: Wood strip; five large razor blades glued into one side; six small razor blades glued into other and wrapped with boxing tape, rubylith and clear tape; handle wrapped with boxing tape.
Backstory: Lifted from the facility’s metal sign shop, this shiv is wrapped in “rubylith” — a red, masking tape classically used in signmaking (and, before the digital revolution, commonly employed by graphic designers in the production of “mechanicals”). Eleven disposable razor blades, available for purchase from Rahway’s commissary back in the 1980s, are carefully inserted down the sides... more here

 Materials: Shard of plexiglas; handle wrapped with electrical tape.