Material: Cr-V, size: 3~6mm (1#), 6~8mm (2#), 8~11mm (3#), 11~14mm (4#), 14~18mm (5#), hardness: 48~52HRC, coarse thread, packed by plastic box.
Material: Cr-V, size: 3~6mm (1#), 6~8mm (2#), 8~11mm (3#), 11~14mm (4#), 14~18mm (5#), hardness: 48~52HRC, coarse thread, packed by plastic box.
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