Handling Powder Actuated Tools (PATs) Safely A powder-actuated tool (PAT) is a tool that gets its power from an explosive charge. The tool uses the expanding gas from the explosion to drive a fastener into materials such as masonry, concrete, steel, and other hard surfaces. Only trained, competent, and authorized persons are permitted to operate a powder-actuated tool (also known as explosive-actuated tools). The training should be in accordance with the specific tool manufacturer’s criteria. A card verifying training should be issued to the authorized person after training is completed. Unauthorized or improper use of a powder-actuated tool could result in...