Diamond coated concave grinding bits 10 pcs 2.35mm shank- 8mm

Diamond coated concave grinding bits 10 pcs - 8mm
Head diameter:8mm, grit: 120#, total length: 42mm, shank: 2.3mm
for carving, rounding, jade carving, and polishing beads made of jade, ceramics, glass, gemstones, and other materials