Item Type: ER20 Collet Chuck. Product Model: ER20 chuck milling cutter storage set. Specifications: The set includes 10 x milling cutters, 16 x ER20 chucks, 1x storage box. 16 x ER20 Chucks. The milling cutter has the ability to resist chip removal, which makes the cutting smoother and does not stick to the knife.
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