Applications : For attaching wire lathe to wood, steel, concrete or block for the purpose of troweling stucco in exterior applications or plaster in interior applications. Can also be used as a general purpose washer. Contractors :Drywall, Plasters, Exterior Siding Contractors Recommended Pin Size(s) :55080 780 Trak-It Step Shank Pins (all base materials)55033 1" Break Free Rolled Point Trak-It Pins (most base materials) 55034 1-1/4" Break Free Rolled Point Trak-It Pins (most base materials)