When did a vandal with a knife cut The Night Watch ?
Subtypes include : * Lockback knife : a folding knife with a mechanism that locks the blade into the open position , preventing accidental closure while in use * Multi-tool and Swiss Army knife , which combine a folding knife blade with other tools and implements , such as pliers , scissors , or screwdrivers Produce knife : A knife with a rectangular profile and a blunt front edge used by grocers to cut produce .