... best quality Super High Quality U -TYPE NAIL 1.material:Q195 wire rod2.length:12-55mm3.dia:BWG6-BWG244.shrank:smooth,ring5.surface:polish,galvanized6 ... /drilling screw, common nail, concrete nail, duplex nail, finishing nail, roofing nail with umbrella head, roofing nail with flat head, boat nail, coil common nail and coil roofing ...