There are THREE (03) grades of every product, manufactured product, typically:
Commercial Grade: Worst in quality, Low tolerance and easily broken.
Industrial Grade: High resilience, ability to withstand wide range of temperatures and conditions and high tolerance
Military Grade: Highest resilience, highest tolerance, very rugged and durable in extreme operational conditions!
That's why from USB Flash Drive to Pistols to Radios to Vehicles peoples prefer Military Grade Construction and if not possible then Industrial Grade!