A great new product! Perfect for finishing those holes you made in polymer, resin, BronzClay, CoPPRclay, Faux Bone and more. ID is Inner Diameter. Sold in packs of 10, which make 5 eyelet front and back. No more annealing tubing to flare out. These are already flared. Just insert them into a friction-fit hole, or use a little epoxy. What a way to finish your work!