... .shank:smooth,ring 4.Short delivery time and best quality Super High Quality U -TYPE NAIL 1.material:Q195 wire rod2.length:12-55mm3 ... focus on engaging in the nail&screw,including drywall screw, chipboard screw, self tapping/drilling screw, common nail, concrete nail, duplex nail, finishing nail, roofing nail with umbrella head, roofing ...