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The company I worked for at the time was told by the principle contractor who was told by the client that they were required for all work onsite that involved drilling into walls or floors. This was after someone accidentally knocked out an air traffic control server room with a services strike, luckily because it was a critical system there were/are multiple redundancies. It did however cause a certain amount of chaos.
Only one I've ever used that was any good was this one from Bosch but it's not cheap.