Falcon Prop Inserts

This set of prop hub inserts can be used to reduce the hole size in wood and other types of propellers. It will allow you to reduce a 10mm hole down to 8mm, 6mm, 5mm, 4mm hole sizes or an 8mm hole down to 6mm, 5mm, 4mm. 8mm OD rings will fit inside the 10mm OD so you can step down any 10mm or 8mm hole to any size motor shaft you're trying to fit.