This weapon, allegedly popular among Paris street gangs, was fitted with a folding blade and knuckle-duster.

A slipjoint knife consists of a handle with one or more folding blades.

These featured a robust and simple design where a folding cutting blade and absence of a handle significantly reduced the opener size.

Knife pistols with folding blades were popular in England during the mid Victorian era.

Various types of knives with folding or retractable blades rely on latches for their function.

A gravity knife relies on a latch to hold the folding blade in an open position once released.

Its small design and folding blades make it easier to travel with or to fit behind dressers and tables.

Jack, a scowling, heavyset man wearing dark glasses and carrying an oversized folding blade, stands in front of the doorway.

If he missed that, he definitely would've noticed me struggling to pry out one of its folding blades.

He slipped them into a pocket; a wrench set and folding blade into another and left his quarters.