3M Radial Bristle Disc Master Kit Glardon-Vallorbe Diamond drills are best used

Diamond drills are best used with lubrication

Square hole profile for drawing square-section wire

75" (197 mm) Center of Rotation Adjustable via release lever Brand GRS Notes

Recommended replacement interval: every 6 months under regular use

Available in a two-tone 14K white head with 14K yellow shank combination or in full platinum

3M Radial Bristle Disc Master Kit Glardon-Vallorbe Diamond drills are best usedThe 3M Radial Bristle Disc Master Kit gives professional jewelers and metalsmiths a complete range of miniature radial bristle disc wheels in all three sizes 1", 3 4", and 9 16" along with mandrels, in a single comprehensive set. These long lasting discs work like natural bristle brushes but require no added polishing compound; the abrasive is built directly into the bristles. Simply stack individual discs onto the included pin hole mandrels four to