The Sealey SA4 is a heavy-duty air impact wrench with 3/4″ square drive, engineered for demanding workshop applications in garages and tyre shops. Delivering an impressive 540lb.ft breakaway torque and 520lb.ft fastening torque, this professional-grade tool handles the toughest wheel nut removal and heavy fastening tasks with ease. Built around a robust rocking-dog hammer mechanism with hardened anvil and cage, the SA4 ensures reliable performance under sustained use. The polished aluminium housing provides durability whilst keeping the overall weight to a manageable 4.5kg, making it suitable for extended operational periods. Variable air and torque control allows operators to adjust power output for different applications, whilst the reversible action facilitates both fastening and loosening operations. Operating at 90psi with 7cfm air consumption and reaching speeds of 4500rpm, this impact wrench is ideal for professional mechanics working with commercial vehicles, agricultural machinery, and other heavy-duty equipment where substantial torque is required. Features and Benefits: • Rocking-dog hammer mechanism with hardened components for enhanced durability • Variable air/torque control for precise power adjustment • Reversible action for versatile fastening and removal operations • Polished aluminium housing combines strength with reduced weight • 3/4″ square drive suitable for heavy-duty sockets and applications Specifications: Air Consumption: 7cfm Brand: Sealey Breakaway Torque: 540lb.ft/(734Nm) Drive: 3/4″Sq Fastening Torque: 520lb.ft(707Nm) Free Speed: 4500rpm Inlet Size: 1/4″BSP Nett Weight: 4.5kg Noise Power/Pressure: 107/96dB(A) Operating Pressure: 90psi Vibration/Uncertainty: 4.89/0.98m/s²