The team drew their ideas and then tested their prototypes on Hugh's farm and at school before deciding on the end design.
The idea is that the frame attaches to the borer and a stable platform, such as a trailer or quad bike, eliminating potential danger such as twisting or snagging and throwing the operators.
It was pitched at the Crocodile Pit (the school's version of the Dragon's Den) and they were inspired to continue to Fieldays.
Crankworks teamed up with Tauranga engineering firm Trench It to come up with the working model for Fieldays.
The boys said Fieldays Innovation Tent was hard work - but worthwhile.
Connor says lots of people said the idea was simple but genius.
There were also offers to help with development and manufacture.
"We got roasted a bit, but the feedback was constructive and it will help us develop the product further," says Ben.
The award included $1000 cash, which Crankworks plan to use to fine-tune their invention and go to market.-