【Universal Size】 Standard T50 staples is generally suitable for most manual /electric /pneumatic staple guns. 【Made of Galvanized steel】These nails are made of the great galvanized steel, strong rust & corrosion resistance, sturdy and not easy to break, with good toughness and tensile strength, which are smooth and bright on the surface with no nail jamming The Chisel point type help you push the nail out more accurately and conveniently. 【Wide Application】 - For heavy-duty stapling jobs such as housing insulation, house wrap, roofing felt, wiring, weather-stripping, carpet underlaying, upholstery, and hobby and craft materials. 【Better package protection】Giving the finish nails multiple packagin protection, make sure our customers get the complete nails. SITLDY Heavy Duty T50 1/2 inch Staples 5000-Count, 20 Gauge Galvanized, for Pneumatic, Electric, manual T50 Stapler Gun