Diamond Reamers Set Wood Handle Bead Pearl 4pc Jewelry Beading Dbr4 4 Size Bits include entire range of sizes from: 0.3mm to 5.9mm (and all sizes in between) Handle Length: 5" Diamond Dust coated bits Wooden Handle (reamer bits can be interchanged) Used to File, Enlarge, and Remove unwanted Burr from Bead Holes