modified truss head self drilling screws 1.,Length:13mm~280mm(1/2"~11") 2.Dia.:3. ... ) 3,Points:PT.1~PT.5 description; modified truss head self drilling screws Brand NameGWOriginal of PlaceShanghai ChinaMaterialCarbon steel ,stainless steel, brass ... Drawing or Photos or Samples to us modified truss head self drilling screws