Bead Reamer Set 4 Piece Bead Reamer Set indispensable set of tools for smoothing the holes of beads just about any size you want these are diamond tipped and can soften rough edges to prevent beads from cutting into threads apply a very slow gentle pressure to anything you need to smooth pick the tool most suited to your bead glass or gemstone beads will yield results when you need to smooth a rough edge or an errant bead. 4 tools conical round fine and thick these tools are particularly helpful for any manufacturing edges that need smoothing for Murano glass in particular.