A hole saw you use for your screwdriver to drill holes in the lid of your container.
A spring pushes out the piece you removed.
Available in two sizes. One for our 32mm baskets (33mm bore) and one for our 50mm baskets (48mm bore). Fits in all screwdrivers, the attachment is 10 mm.
Drill at a very low speed otherwise the plastic will melt and leave a smaller and uneven hole.
Sometimes you have to clear the hole with a file or knife.
The hole should be a little smaller than the basket so it is held securely and does not tip over when the plant gets bigger.
