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Barrel burs made from economical vanadium steel. Shaped similar to cylinder burs, but with rounded edges both top and bottom. 3/32" shanks.
Vanadium Steel burs are economically priced. They cut precisely when new, but don't retain their sharpness as long as other steel alloys. They're used at low speeds.
3/32" dia. shanks are the jeweler's preferred standard for burs and small rotary tools. They fit the adjustable chucks found on most flexshaft handpieces as well as 3/32" handpiece collets.