Wire Rounder Tool.1.8mm Cup Bur With Wooden Handle.Simple and economical wire rounding cup bur with handle.The one and only tool to effectively de-bur the end of a wire after it has been cut! Just what you need if you make your own ear wires or work with a lot of wire in your jewellery.This 1.8mm cup bur does the job with a couple of twists of the hardwood handle.Use the 1.8mm cup bur to file thicker wire up to 14 gauge.Measurements: 5 Inches.1.8mm Cup Bur.Example photo shows rounded wire on left and wire that has not been rounded on the right.