Fits: (OD 0.717″ to 0.736″) Bostich N75C, Hitachi NV65AH2, Freeman PCN65 Designed to increase installation speed of popular engineered wood panels while meeting manufacturer’s specifications. Provides the correct nail placement consistently while reducing reliance on acute eye-to-hand coordination. - Allows variability in gun angle while still landing in the “best practices” fastener zone. - Spring loaded pin allows normal use of the nailer. - Anodized finish - Hex key included - Stainless steel set screws. EW gauge models are design to place nail 3/4" from edge. Fits: (OD 0.717″ to 0.736″) Bostich N75C, Hitachi NV65AH2, Freeman PCN65 *** Note: While other nail guns/nailers may be compatible, listed above are the only ones known to fit. *** Check WellsDesignToolco.com for up to date list of compatible siding nailers.