Abstract: A fastening tool that inserts a fastener into a work-piece includes a trigger and an actuation member connected to the trigger. The fastening tool further includes a trigger switch and a trigger block. The trigger block has a blocked position that inhibits the actuation member from actuating the trigger switch. The trigger block also has an unblocked position that does not inhibit the actuation member from actuating the trigger switch. The mechanical contact trip mechanism provides a contact trip without the need for additional switches and a complicated trigger assembly.

Abstract: A fastening tool including a contact trip mechanism having a trigger block. The contact trip mechanism is moveable to a retracted position. The fastening tool also includes a slider member connected to the trigger block and a link member adjustably coupled to the slider member. The fastening tool further includes a lockout pin movable between a first position and a second position. The lockout pin in the first position decouples the slider member and the link member and holds the trigger block in a blocked position.