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100% brand new and high quality.
Eliminates need to change collets when swapping between bit sizes. Twist-to-tighten/loosen with heavily-knurled grip means no wrench or key needed. Heat treated & tempered high-carbon steel for durability; rust-resistant black oxide finish. Corded Rotary Tools without changing collets. It accepts all accessory bits with 1/32 and 1/8 shanks. Specification: 4 types for choice. Please check the size photo for reference.