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Mushroom Log Inoculation Drill Bits














For use with | Plug spawn; sawdust spawn |
These specialized stainless steel drill bits are used to drill holes into logs prior to inoculation with mushroom spawn. In addition to speeding up the process, they also ensure that each hole is an identical size and depth.
Make sure you have the proper sized drill bit for your mushroom log project.
- 8.5mm drill bits - for plug spawn
- 12mm drill bits - for sawdust spawn
Want to speed up your job even more? Check out our angle grinder adapter here!
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- Reviews
- Questions
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Sharp bit, perfect depth setting!
Worked great to drill holes in alder and maple to inoculate logs with plug spawn.

Took a while but great
Shipping took a while which I understand other than that they reach out to me and provided excellent customer support always love north spore

Drill Bit
I debated if i really even needed this. Um, yes! Super easy and quick.
Got to have it
Great bit, used on 100's of logs

Game changer
Having this bit mounted to an angle grinder is a game changer, so much faster inoculation than a standard drill bit.

Mushroom log inoculation drill bit
Works much quicker than drill bits! Thanks

Where have you been all my life?
I wish I had discovered this 4 years ago when I started drilling logs. It was a total game changer. It stops at the perfect depth every time AND it empties the hole of the sawdust. The plugs fit perfectly.

Well worth cost!
I have other bits and bit stops for plug insertion, but this one (even after 2100 plugs) clears the holes perfect with no efforts!

This bit is ready to work hard!!
This drill bit is ready for a full day of innoculating. It’s super sharp and works really well.

Drill bit
The bits performance was good Stade sharp over 2000 holes. The only change I would make is to make the collar deeper and wider for logs with bigger bark.