Originally Posted by
harry strasil
100grit would be considered a polish on the shank of a holdfast! The rougher the better,20-40or60Gri twould work well. IF NOTHING ELSE WORKS, USE A COLD CHISEL TO ROUGHUP THE SHANKS,OR TRY DRILLING A LARGER HOLE IN A SCRAP PIECE THE SAME THICKNESS .MY 5/8" hholdfasts will holdfast in a 1" hole. Most people want to polish things up and in this case that is th worst case cinerio. There will be nomore holdfasts from me as I am not physicaly capable of making them anymore.I had back surgery gone bad then I had a bad fall and spent a week or so in the hospital. I CAN HARDLY STAND AND WALK,so I set and hone my carving chisels.