Can opener

Even the work of opening a safe with nitroglycerine or with a can opener places the criminal in a state of nervous tension.

“I wonder why they didn't use 'soup' (nitroglycerine) snuffing the drum (blowing safe) instead of a 'can-opener,” (3 ft. steel rod, pointed one end to punch starting hole in bottom of safe, other end shaped like a can opener to peal^([sic]) the bottom of safe open.) commented McLaughlin? ^([sic])