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• 100% brand new and high quality
• Interface has a locking mechanism, built-have magnetic, automatically pop up batch head.
• Suitable for drill, screwdriver, batch head and other to transfer.
• Extend all kinds of screwdriver bits, screwdriver head conversion uses.
• Fast, fastening; Greatly improve work efficiency.
• Specifications: 1/4" hex shank (6.35mm) 
• Length: 60mm 
• Color: Black+Silver
• Quantity: 1 Pc Bit Holder