Finish: Bright *Gauge: *Head Diameter: *Head Type: *Length: 2-1/2 *Material: *Nail Type: Masonry *Number in Package: *Packaging Type: Boxed *Point Type: *Product Type: Nail *Brand Name: Pro-Fit *Shank Diameter: *Shank Type: Fluted Shank *Size: *Callout Size: *Container Size: 1 *Sub Brand: *Color: Gray *Indoor or Outdoor: Outdoor For attaching furring strips and floor plates to uncured concrete *Heat treated for hardness *Fluted shank eases penetration to minimize splitting *Should not be used with treated lumber