Workpiece-contacting probe for fastener-driving tool for fastening lath to substrate

A fastener-driving tool, comprising:

• a nosepiece;
• means for driving a fastener from said nosepiece, through a workpiece, and into a substrate;
• a safety actuating member movably mounted upon said tool for movement between an extended power-inhibiting position, and a retracted power-enabling position;
• a workpiece-contacting probe disposed forwardly of said nosepiece and having means disposed thereon for releasably holding a washer plate thereon such that said washer plate is interposed between said nosepiece and said workpiece;
• and
• means mounting said workpiece-contacting probe upon said safety actuating member for properly aligning said workpiece-contacting probe, and said washer plate housed thereon, with respect to said fastener driving means such that said fastener driving means can drive said fastener through said workpiece-contacting probe, through said washer plate, through said workpiece, and into said substrate, and for moving said safety actuating member from said extended power-inhibiting position to said power-enabling position so as to enable said tool when said workpiece-contacting probe is moved against said workpiece.