An x-ray machine which can show weapons hidden under clothes is one of the tactics being used by police to clampdown on knife crime.
The scheme aims to raise awareness of knife crime
Operation Blunt, which is being piloted in the London boroughs of Southwark, Sutton and Hammersmith and Fulham, aims to arrest and deter perpetrators.
Territorial Support Group Officers will target "knife hotspots".
Commander Simon Foy said the young need to be educated that knives "are not glamorous but potentially lethal".
Scotland Yard said young people aged 12 to 20 are more likely to be both offenders and victims in knife crime cases.
A roving road show will be used to raise awareness in this age-group.
The x-ray scanner will be shown to young people at the road shows as well as used on suspects as a quick alternative to a traditional search.
There will also be a series of knife amnesties so people will be able to give-up unwanted knives.
Commander Simon Foy said: "The Met is saying enough is enough. There is an unacceptable level of knife related violence taking place on our streets.
"We all have a responsibility to help educate our young that knives are not glamorous but potentially lethal. "
If the scheme is successful it will be rolled out across London.