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Ocut M3-M20 Tap Thread Tapping Die Set 32PCS Hand Tapping Tooth Opener Thread Opener Combination Thread Drill Bit Thread Tool Hand Twister

Bearing steel is superior to ordinary carbon tool steel and has good impact toughness and fracture toughness. Tap dies made of bearing steel are more stable and have more standardized dimensions. The round die is designed with a tapered locking hole. After the screws are aligned and locked, the locking force is strong and not easy to loosen.