The phrase "are capable of crushing" is correct and usable in written English.
It can be used to describe the ability of someone or something to exert significant force or impact, often in a metaphorical sense.
Example: "The new machinery are capable of crushing the competition in the market with its advanced technology."
Alternatives: "have the ability to crush" or "are able to crush".
They are capable of crushing mollusk shells and instantly killing prey with a blow of this structure.
In his last paragraph, he posed well the central question of what will face the world when the war is finally over: **{:.break one} ** No one argues much now about whether these [American] forces are capable of crushing even very serious opposition, and almost no one argues that Iraq offers serious opposition.
Speaking at an antitrust conference earlier this year, Albert Wenger, a managing partner at Union Square Ventures, said that one of founders' top priorities these days is to avoid the internet giants' "kill zones," the areas in which they are capable of crushing any competition.
It stopped and idled much like a regular garbage truck; likewise, its hopper was capable of crushing and storing up to 13 tons of trash.
"Newscasters, radio shock-jocks and policemen on the make are shown to be capable of crushing an individual for their own purposes".
A third swings kettlebells – a bit of a mis-step: these iron lumps may be capable of crushing a man's skull, but their handling on stage is unengaging.
"Coming of Age" proves that Foster is capable of crushing the high notes in full voice, while songs like "Goats In Trees" and "The Truth" find him settling into his lower register, very much akin to the baritone of The National's Matt Berninger.
Nereus dived nearly twice as deep as other research submarines are capable of and had to withstand crushing forces.
"Bionic" arms are capable of picking up fragile objects without crushing them and of moving fingers individually.
Singapore would probably crush every other country, raising the bar for what children are capable of doing.
All are capable of playing man coverage.
