1. Weight: 65mm 12g/piece, 110mm 23.5g/piece 2. Overall length: 65 mm, 110 mm 3. Rod diameter: 6.35 mm 4. Material: alloy steel 5. Scope of application: wind batch, impact drill, electric hand drill, electric batch and other tools 6. Features: can attract the screw without shaking, non-slip, large torque, forged with D1 alloy steel, good hardness, PH2 double-headed cross type, interchangeable heads, simple operation, magnetic can attract With small screws, reduce mistakes, improve work efficiency, and be durable