HW HAMWOO There are 6000 pieces T50 Galvanized staples with 5 different sizes in the package: 1/4"-1200,5/16"-1200, 3/8"-1200, 1/2"-1200, 9/16"-1200, You can choose different sizes of nails according to actual needs. These sharp staples 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 T-shaped head and Chisel point design with strong penetrability lets you use Stapler nails very easy,and you will have no jams and buckles, and interruptions.Perfect for all heavy duty stapling applications from installing insulation housewraps and roofing underlayment such as housing insulation, roofing felt, fence wiring, weather stripping, carpet underlay, upholstery, DIY and craft materials.