Rotary burr

From GAWDAwiki

A rotary burr is a handheld power cutting tool with multiple cutting edges spaced close together that is used for finishing or deburring edges. Rotary burrs can be fitted with attachments for carving, sanding, polishing or other applications.

Rotary burs are cutting tools with many closely-spaced cutting edges, often with negative rake angle, for finishing or deburring edges.^[1]

References

1. http://process-equipment.globalspec.com/LearnMore/Manufacturing_Process_Equipment/Cutting_Tools/Rotary_Burrs