Our manufactory is sepecialized in producing Roofing Nail with Smooth Shank Or Twist Shank. Roofing Nail Features1)Diameter : 12BWG-8BWG.2)Length: 1 ... .5"-3.5".3)Finish :roofing nails with umbralla ... nails, Roofing nails, Book nails,Square boat nails,Duplex Head Nails,Finishing nails,Coil Nails,Cement Nail,U-shade Nail, etc. ...