HASMX 647956-00, 64795600 Trigger Valve Assembly for Dewalt Fits the following models: D51256 Type 1 Finish Nailer Kit, D51256 Type 2 Finish Nailer Kit, D51238 Type 1 Brad Nailer Kit, D51430 Type 1 - Amazon.com
DeWalt D51256 1 1/4"- 2 1/2" (32 - 65mm) x 16 GA. Finish Nails Construction Tool | eBay