5Pc Electrical Diamond Bead Reamer Lapidary Jewelry Drilling Tool Set Go to amazon.com Related posts The 14 best bead reamer tool 2022 Feature1Pc Electronic Diamond Bead Reamer4 Pc Bead ReamersLength : 6-1/2"Holds upto 1/8" Diamond ShankErgonomic Design for Comfortable Grip DescriptionPush Button Operation. Requires 2AA Batteries ( Batteries Are not Included)