I simply needed something to dig into the soil when I transplant seedling from the 72-cell to a bigger container without damaging the root. All you need is a bolt that's a little bigger than the hole or just simply glue in a wooden/metal rod into the hole. What i did was tap the hole with a 3/8-16 tap and then screw in a bottle opener.
SeedlingDibber.STL | 329.1KB |