Type: Umbrella Head Roofing Nails Materials: Q195,Q235 or according to your request. Head: Umbrella head with or without a washer. Shank: Smooth shank/Straight shank, twisted shank/Spiral shank (ring shank). Point: diamond point Shank Diameter: 9BWG~13BWG. Length: 1.5",1.75 ",2",2.5",3",3.5",4" or according to your request. Treatment: bright(polished) or galvanized or according to your request. Standard Packing: 7LBS 8Boxes/CTN, 25Kgs/Bag,50Kgs/Gunny Bag,1000CTNs/20GP Application: Roofing nails are widely used for roof installation, fastening roofing felt, roofing flashing, woodworking or other construction industry fields.