Pneu-Fast SP16D 3-1/2-by-0.131-Inch Clipped Head Nail for 30-33 Degree Nailers, 2500-Count Highest quality steel along with full gauge precision creates more tensile and shear strength Superior Hi-Bond resin tape that will remain rigid in water exposure Exclusive Hold-Fast acrylic glue coating delivers maximum holding power in all types of wood Packaged in sturdy cartons that are virtually weather proof All Pneu-Fast collated fasteners meet or exceed ASTM performance standards