What are these called ?????

[alanatnoosa]

I'm about to list these in the Buy/Sell/swap forum, but I'm not sure on the correct terminology for them ... hole cutting bits ???
I used one of them to cut out wheels for a toy truck, so I'm sure one of you expert toy makers out there will know the answer Thanks in advance !!

[chrisb691]

Holesaws.

[roy clarke]

Best get the dedicated ones, and gradually collect a set. More expensive to start, but FAR better.