JeremyL
Well Known Member
I don’t know who needs to see this, but if you are trying to decide how to countersink fiberglass and don’t want to destroy your metal countersinks, then this little tool is just the ticket. The perma-grit tungsten carbide stone is worth every penny (about $32 US with shipping from the UK). I purchased the 100 degree with no nipple, but they have nipples of various sizes. Makes quick work and a nice neat countersink. Perfect for tinnerman washers and the countersink needed for the flush rivets in the zip tip inspection panel. The “no nipple” allows me to countersink any hole size.