ACDelco ANI405A 1/2-inch Air Impact Wrench – 500 ft-lbs, Twin Hammer, 5-Speed

ACDelco Tools brings a legacy of quality and reliability to your shop. The ANI405A 1/2-inch air impact wrench blends rugged metalwork with practical design, created for professionals who count on their tools day after day. It balances power with control, making it a versatile choice for automotive repair tasks both in a busy shop and on the job site.

In daily use, the tool feels substantial yet manageable in the hand. The lightweight aluminum body helps reduce fatigue during long sessions, while the handle exhaust design keeps the work area comfortable and less noisy. The combination of a robust twin hammer system and a five-speed control setup gives you steady, dependable performance across a range of fasteners and tasks, from quick lug nut removal to more demanding bolts on suspension components.

Power and durability you can rely on

• 500 ft-lbs maximum torque at 90 PSI for stubborn fasteners
• Professional twin hammer design for consistent power and extended tool life
• 5 forward speeds with full-power reverse for adaptable fastening
• Sturdy aluminum body that remains durable while helping reduce user fatigue
• Ergonomic handle exhaust to direct air away and minimize workplace noise
• Easy lubrication via the 1/4-inch NPT inlet to support longevity

Real-world use and benefits

In automotive repair, the ANI405A helps you tackle rusted lug nuts and heavy-duty bolts with confidence, while maintaining a balance between speed and control. The tool’s design emphasizes comfort during longer sessions, especially when working overhead or in tight spaces where weight and balance matter.

For fleet or shop environments, the tool’s rugged construction and reliable performance translate to predictable results over time. The available power, coupled with a quiet exhaust and a manageable weight, can make repetitive tasks feel less strenuous and more efficient.

Specifications and care

• Square Drive: ½ inch
• Max Torque: 500 ft-lbs (677 Nm)
• Free Speed: 8,000 RPM
• Air Consumption: 17.7 SCFM (833 L/s)
• Overall Length: 7-1/4 inches (184 mm)
• Air Inlet: ¼ inch NPT
• Air Pressure: 90 PSI (6.2 Bar)
• Hose Size: 3/8 inch (10 mm)
• Tool Weight: 5.72 lbs (2.60 kg)
• Standard Bolt Size: 5/8 inch (M16)

For optimal performance, use with an appropriate air supply and maintain lubrication through the standard inlet. This approach helps ensure peak internal component performance and a longer tool lifespan in demanding workshop environments.