Wholesale Mechanic Screwdriver

1. Torque Range
Low torque (such as 5-25Nm): suitable for precision assembly of bicycles, electronic equipment, etc.
Medium torque (such as 20-200Nm): widely used in automobile maintenance and mechanical assembly.
High torque (such as 100-1000Nm): suitable for industrial equipment, large machinery, and heavy trucks.

2. Drive Size
1/4 inch (6.35mm): suitable for small bolts and precision work.
3/8 inch (9.5mm): suitable for general maintenance and automobile assembly.
1/2 inch (12.7mm): the most common, suitable for automobiles, motorcycles, and industrial applications.
3/4 inch (19mm) and above: suitable for heavy machinery and engineering equipment.

3. Wrench Type
Mechanical (Click Type): makes a “click” sound when the set torque is reached, economical and durable.
Digital: With LED or LCD screen, real-time display of torque value, higher accuracy.
Dial: Suitable for high-precision torque testing, intuitive reading of values.
Electronic: Can store data, output torque curve, suitable for professional testing.

4. Material
Chrome vanadium steel (Cr-V): wear-resistant and corrosion-resistant, high strength, suitable for most applications.
Chrome molybdenum steel (Cr-Mo): Stronger toughness, suitable for high-intensity industrial operations.
Aviation aluminum alloy: Lightweight design, suitable for portable needs.

5. Accuracy Level
±4% (ordinary level): Suitable for general maintenance and DIY purposes.
±3% (standard level): Suitable for automotive maintenance and industrial assembly.
±2% or higher (high precision): Suitable for laboratories, aerospace, precision manufacturing.

6. Measurement Unit
Nm (Newton meter): International standard unit, commonly used in the automotive and mechanical fields.
ft-lb (foot-pound): Mainly used in the North American market.
in-lb (inch-pound): Suitable for small torque applications, such as electronic equipment.

7. Wrench Length
Short (200-300mm): Suitable for operation in small spaces.
Medium-long (300-600mm): Most common, suitable for most applications.
Extended (600mm or more): Provides greater leverage, suitable for high torque applications.

8. Handle & Appearance Customization
Handle material: rubber anti-slip, metal brushed, plastic coated.
Handle shape: straight handle, T-shaped, foldable.
Color customization: Spray color can be customized according to brand requirements.
Logo customization: laser engraving, silk screen printing, in-mold injection molding and other processes.

9. Packaging & Accessories
Customized storage box (plastic, aluminum alloy, EVA lining).
Matching sleeve (customized specification combination).
Instructions and calibration certificate (supports brand customization).