SITLDY Heavy Duty T50 Stainless Steel 304, They are can block rust and corrosion resistance.these staples will last you a long time. The 20 gauge T50 staples are ideal choice for light-duty to heavy-duty stapling jobs such as housing insulation&wrap, roofing felt, fence wiring, weather stripping, carpet under laying, upholstery, DIY and craft materials, Universal fit design works with a variety of staplers,Use for finishing plus many more uses. Giving the T50 staples multiple packagin protection, make sure our customers get the complete nails. There are 2000 pieces T50 Stainless Steel 3/8" staples