This is the large carving knife sold by Liverpool discount store Home Bargains to a 15-year-old boy during a city council test purchase.
In November, last year, public protection officers hand delivered a letter to the firm's Hanover Street store in the city centre, Liverpool Magistrates Court was told.
It placed the premises on notice that a test purchase test operation would be carried out at an undisclosed time between November and March.
On November 17, a female member of staff was witnessed selling a carving knife to a 15-year-old boy, acting as a volunteer, prosecutor Jonathan Ball, representing the council said.
The teen bought the blade set, around six inches long, and tea towels for a total price of £4.78.
The employee who completed the sale was interviewed by officers who explained she thought the customer looked 18.
The store manager was advised that more test purchases would be carried out.
Another warning letter was hand delivered to the shop on November 28, explaining that no further action would be taken but also detailing how enforcement action would take place in the event of any future breaches.
On December 9, another test purchase was carried out at the same Home Bargains store on Hanover Street.
At around 10am, officers witnessed a male employee sell a carving knife to a 15-year-old boy, acting as a volunteer.
He was not questioned about his age or asked for ID.
Officers spoke to the store manager and invited Home Bargains owner TJ Morris to a Police and Criminal Evidence Act (PACE) interview, but it chose instead to respond to written questions.
The company was charged with selling a knife to a person under 18, and it pleaded guilty.
It was heard that TJ Morris has a recent conviction for a similar offence that was dealt with at Swansea Magistrates Court in March.
Two senior representatives from the company, who declined to give their names to the ECHO, were sat in the dock.
District Judge Wendy Lloyd told them their "due diligence had fallen short and that was not good enough".
She added: "The reality is that knives kill and we know knives are a particular problem in this city, and in most other large cities.
"I'm told good procedures were in place, but they didn't work.
"The seller thought it was enough to think he was old enough."
DJ Lloyd was told TJ Morris had improved its systems with more prompts from the till and online training stepped up.
She added: "This is a serious matter, knives on our streets sold to young people causes a great problem."
The district judge asked company barrister Lee Finch to disclose the company's sale figures so she could decide on the appropriate punishment.
After some delay, the lawyer revealed the firm had a £2 billion turnover with a profit of £164 million.
TJ Morris was fined £4,000, and was given 21 days to pay it.
DJ Lloyd added: "The punishment is about their finances, but also the potential loss of reputation."
