Ann Clark from Horowhenua District Council emailed this:
What a brilliant day on Saturday [at the spinifex planting], so great to see new faces helping out there.
I had a couple of people asking on the day where I got my drilling auger from and promised I would send this through to you to share.
My one is called a power planter, bought it through their website www.powerplanter.co.nz a few years ago now.
There are lots on the market now I see, can’t attest to the quality of those but have absolutely no complaints about my one which I use at home as well.