• High hardness, non-slip, large torque, long life and durable. 
• The screwdriver head has strong magnetic so that it can self-lock the connecting rod. 
• Strong practicability, it can change external six angle into internal six angle. 
• It can join electric screwdriver, screwdriver, screwdriver nozzle, screwdriver head. 
• It applicable for exchanging the sleeve and the joint, prolonging the connecting rod. 
• It can be flexibly used in situation of narrow space, use it to reach the work-place where hands can not reach. 
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• Specification: 
• Material: Carbon Steel + CRV 
• Shank shape: Hex shank 
• Shank diameter: 1/4 inch (6.35mm) 
• Sleeve diameter: 10mm 
• Sleeve significant depth: 9.5mm 
• Total length: 75mm/ 100mm/ 150mm 
• Color: As the picture show 
• Quantity: 1 Set (3Pcs)