Question

which fastening system is used to drive steel pins or threaded studs into masonry and steel? pneumatic screw nailer powder - actuated tool air impact wrench mini hammer drill

Explanation:

• A pneumatic screw nailer is mainly used for driving screws and nails in wood - related applications.
• An air impact wrench is used for tightening or loosening nuts and bolts with high torque.
• A mini hammer drill is used for drilling holes in masonry, concrete, etc., but not for driving pins or studs in the way described.
• A powder - actuated tool uses a controlled explosion (from a powder charge) to drive steel pins or threaded studs into masonry and steel.

Answer:

powder - actuated tool