Shop the DEWALT DFD270 Tool (Powder-Actuated) - Tools, DFD270 Tool Single Shot (Deluxe Kit). The DFD270 Tool is a low velocity, fully-automatic, .27 caliber powder-actuated tool with adjustable power. It drives both 8mm and 0.300" head fasteners and clips in lengths from 1/2" to 2-7/8", as well as 1/4" threaded studs, and is available in single-shot or magazine versions for high capacity commercial operations. Powder-actuated tools may be used only by properly trained and licensed operators per ANSI Standard A10.3.