In the nail industry, there are many kinds of specifications and different styles of nails, the use function of various nails are not nearly the same, as the demand of the nail industry market, expand la explosion screw nails has become the nail industry is new bestow favor on, because of its unique specifications and features, expansion la explosion screw nails profits in the market is quite big, let's make a brief introduction of expansion, screw nails.  

Expansion pull blasting screw nails also called screw, nut structure with a deformation can be, when the screw tighten nut with pull pull nut deformation of nut, is also dig a hole in the wall and put the bolts in the hole, the screw down the bolt circle tube was squeezing open, such making that bolt card in the hole, play a fixed role.