Hitachi 20138S Hitachi 20138S 3-1/4-in x .148 Bright Smooth Shank Plastic Collated Nails, The smooth shank nail provides excellent holding power in most wood applications Plastic collating not likely to cause splitting of wooden materials Hitachi 20138S 3-1/4-in x .148 Bright Smooth Shank Plastic Collated Nails