• Twin Hammer mechanism.
• Directional smelting manufacture, light and durable, high power.
• Easy adjustable power regulator.
• ldeal for general repair on cars， tires, and heavy equipment.

https://www.zjzmtools.com/product/1-2-inch-pneumatic-tools/zm3900b-heavy-duty-3-4-high-torque-composite-pneumatic-wrench-tools.html