Ruspert Plating :More Effective Antirust , 6x Better Than Zinc Plate.
Usable for the plywood , billboard , steel plate and multipurpose ,
can screw directly without pre-drill ,
extra width screw head : for more faster ,
convinience and more tightly holding with the workpieces.
#6 Wave Dome (Wafer Head Screws) :
Small drill point and deeper threads for more effective holding with aluminium or less than 1mm. thickness steel plate.
#8 Wave Dome (Wafer Head Screws) :
Usable for the thickness 3.2mm. steel purlin.
#10 Button Head Screws :
14mm. Special width head for 2x more tightly hold with the thickness 4mm. steel purlin.