Original DeWalt Trigger — part number 478107-00. Direct replacement trigger/trigger-switch assembly for DeWalt demolition/breaker hammers; sold as the single trigger piece (right-side trigger used on the hammer assembly). This part is the replacement trigger shown in DeWalt spare parts diagrams and is intended to drop into the factory trigger location — note the right-side handle and the small retaining pin are sold separately (right handle N167282; pin 377374).

Fits (examples): DeWalt D25980 series (Type 1–4, including D25980K / D25980KB variants) and DeWalt D25981 models as shown in official parts listings — confirm your exact model/type against the diagram before installing.

Why this part matters: if your hammer’s trigger is cracked, sticky, or not making contact, replacing it with this original DeWalt 478107-00 restores the factory control interface and fitment without needing tool shell or handle rework. Sold individually for straightforward replacement during a repair.