South Wales Police is urging the public to hand in zombie knives and machetes during a month-long surrender campaign.
Tougher laws being introduced next month will make it an offence to possess the weapons, as they're added to an official list of prohibited dangerous items.
The Home Office amnesty scheme, which begins on Monday, will allow people to safely surrender the knives at police stations including Barry, Cardiff Bay, Cardiff Central and Bridgend.
They will not face prosecution for illegal possession and can also remain anonymous.
Legal owners of specific zombie knives and machetes will also be able to claim compensation at the same time they surrender the weapons to police.
The scheme runs until September 23rd, one day before changes to the Criminal Justice Act ban the manufacture, importation, sale and general supply of the weapons.
Superintendent Esyr Jones, knife crime lead for South Wales Police, said: "Knife crime continues to affect only a small minority of our population, but that small minority is still too many."
"We are continuing to work hard to ensure it isn’t a problem which escalates in south Wales, through our multi-agency #NotTheOne education and awareness campaign. But we will also be relentless in bringing perpetrators to justice."
"These style of knives and machetes are clearly designed to intimidate and cause harm, so as a police service, we welcome this ban."
"I’d urge anyone in possession of such a weapon to do the right thing and take this opportunity being afforded to them ahead of the ban being introduced."
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