Simpson T8KRB 8d Siding Nail 2 1 2 in. Type 316 Stainless Annular Ring Shank Full Round Head 25 lb. Chamfering this saw is engineered to this saw is engineered to handle demanding ripping and crosscutting tasks with confidence and control The 1 4" shank makes this bit broadly compatible with compact and mid size routers that are commonly used for furniture and cabinetry work from the blunt diamond point that protects boards during driving to the passivated 316 stainless body that holds up in the field Engineered for harsh coastal conditions Type 316 stainless steel paired with passivation makes this nail one of the most corrosion resistant options available for exterior siding