Use the Beadalon Very Fine Pearl Reamer to enlarge and smooth out drill holes in pearls. The sharp, corkscrew-like file fits easily into the hole of any small pearl. Simply slide a pearl onto the file, and slide the pearl back and forth until the desired interior diameter is reached. You will notice the pearl dust as it cuts. Drill diameter: 60mm (12.7cm). Made in the USA. Perfect item for your jewellery making.