Reddit reviews TOOGOO(R) 1 Pc Black Hollow Punch Tool Hand Hole Punching Leather/Gasket Carbon Steel Tool (10mm)
We found 1 Reddit comments about TOOGOO(R) 1 Pc Black Hollow Punch Tool Hand Hole Punching Leather/Gasket Carbon Steel Tool (10mm). Here are the top ones, ranked by their Reddit score.
Material : carbon steelHigh carbon steel constructionPrecision ground flutes and cutting edgesEasy-to-grip knurled shanks
How about a leather punch?
https://www.amazon.com/dp/B01448JLZS/ref=cm_sw_r_other_apa_5enYxbEW7V84X
10mm is ever so slightly larger than 3/8.