Newcastle head coach Steve Bruce says owner Mike Ashley and managing director Lee Charnley worked "tremendously hard" to sign Jamal Lewis, Callum Wilson and Ryan Fraser.
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With Newcastle forward Dwight Gayle facing up to four months out with a knee injury, Ashley reportedly upped the club's transfer budget by more than £10m to back Bruce in the market.
"I never had to really twist anybody's arm," Bruce told Sky Sports News. "I think what happened with Dwight put us into a place where nobody wants to be, because you don't want your centre forward - who did really well towards the back end of last season - getting injured.
"In conversations I had with Lee we spoke about how we could get someone through the door who will improve us - especially strikers - and what I wanted was for them to be a little bit proven in the Premier League.
"That's when you need the backing, the backing of Mike and Lee in particular who worked tremendously hard to get them over the line because it was difficult."
Lewis, Wilson and Fraser - as well as fellow arrival Jeff Hendrick - could make their debuts in Newcastle's opening Premier League game of the season against West Ham on Saturday - live on Sky Sports.
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Sky Sports News' North East reporter Keith Downie reflects on Newcastle's spending spree that saw Mike Ashley relax his transfer policy after 13 years in charge...
It says a lot about Steve Bruce's man-management skills and powers of persuasion that he has managed to coax even the most single-minded of men to change their long-standing traits.
Make no mistake, the Newcastle United manager has done what many others have failed to do before him: he's charmed Mike Ashley into relaxing his transfer policy after 13 years at the helm.
Ashley upped Bruce's budget from £30m to more than £40m after a personal plea from his manager to allow him to bring in his key targets.
It's resulted in Callum Wilson, Ryan Fraser and Jamal Lewis arriving in the space of 24 hours to sign long-term, lucrative contracts at St James' Park.
All the latest news, analysis and rumours from the window in one place.
The summer transfer window will run for 10 weeks from July 27 and close at 11pm on October 5.
A domestic-only window for trades between the Premier League and EFL then runs from October 5 and closes on Friday, October 16 at 5pm.
Follow all the news and analysis on Sky Sports News and across Sky Sports' digital platforms, including with our dedicated Transfer Centre blog.