i dont know how you guys do it. but i was looking for small round files today at home depot, while picking up a few packages of bamboo..(hehe), and the sets were 10 and 16. while not bad, i just couldnt justify that price for just the one file. so anyways, i just happen to go through the tile section and i found a tile hacksaw blade. i dont remember the size, but there were only two sizes, its the longer one. its a round blade that fits a regular hack saw. i should have kept the packaging for the size. but anyways, it cuts the nock perfect for my string. just thought id share. and it was only like 4 dollars.