A deadly crucifix and more... Concealed and disguised knives from the FBI

The Fire and Toolmarks division of the FBI started a collection of knives which are small, easily concealed, and can be considered dangerous. Many are common around the home and office, and most can be bought for less than $20.

To find these types of weapons is not surprising, since it's easy to conceal a knife in a product, and it's very likely somebody will buy it. But are these types of deceptive objects actually used for violence and are they effective as weapons, or are they merely novelties?

Here's a quiz: which one of these items does not conceal a knife?

• Key
• Belt buckle
• Necklace
• Key ring
• Ornament
• Crucifix
• Pen
• Walking cane
• Umbrella
• Tool card
• Lighter
• Money clip
• Bullet
• Ring
• Playing card
• Credit card
• Lipstick
• Comb
• Hairbrush

From the FBI, in Google docs>>

See discussion at Schneier on Security>>

(Which item does not contain a knife? None. They all do.)