... origin:Tianjin,China FST18,FST20.FST25.FST30.FST45 FST50 FST black steel concrete nailsmaterial:carbon steellength:18-50mmorigin:Tianjin,China models ... , the commonly used drill holes in the wall, the thwack big wedge, and then driven into nail (nail), is more easy ... with the pneumatic gun.Safe and reliable. Applications: the FST black steel concrete nails are widely used in steel and wood ...