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MEASUREMENT REFER TO OUTSIDE DIAMETER.
Used for rounding off claws setting & wires for a smoother finisher & edge. With flutes on the inside of its cup-shaped head, this bur is used to round the ends of wires, refine the shape of prong tips, and create domed rivet heads. Because it tends to clog easily, the cup bur should always be used with lubrication.
We also sell HSS drill bits , a wide variety of other shaped burs, silicon mounted abrasives & bristle brushes for in your rotary motor. Even handy storage for them! Quality brands like Edenta, Eve, Vallorbe, Foredom, Komet & many more!