Final answer:
A powder actuated tool includes a safety feature that prevents it from operating unless pressed against a resistant surface to avoid accidental discharge and improve safety.
Step-by-step explanation:
A powder actuated tool must not be able to operate until it is pressed against a surface providing the necessary resistance. These tools are designed for fastening materials to hard substrates such as steel and concrete
.The safety mechanism ensures that the tool cannot be discharged in the air which could pose a serious hazard. It requires adequate pressure against the work surface to enable the firing mechanism.
This action ensures that the tool is only used properly and reduces the likelihood of accidental discharge or ricochets.