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Feature
Unique set of all-spherical grinding bits for Dremel-type rotary tools in durable storage case12 ball sizes in 0.5mm steps from 0.5mm to 6.0mm; 1/8"-diameter shanks, 1-3/4"-length
Each embedded with industrial diamond-grit for an incredibly-hard abrasive surface
Diamond bits are favored for use with glass, tile, stone and hardened metals
Excellent for carving, engraving, forming, drilling and filing/material removal