The “usual” hole diameter for workbenches is 19mm.

My DIY wooden workbench has 25mm drilled holes, so I needed a new design.

Standard flat 25mm cutting tool was used.

After a few iterations I found a snug fit diameter with minimum wobble but very low press-in force for PLA Plus.

5, 10, 15mm high stopblock head variants created.

PETG could fit to the shop environment more (moisture, temperature cycling).

In this case adoptation maybe needed due to different shrinkage of the material.