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Candorr Self Drilling Screw have a hardened drill point that will drill and thread in structural steel, mild steel and wood constructions. These Drill points are designed in a manner much the same as a high speed drill bit. They have high hardness, pullout strength, shear strength and lead threads for perfect fastening on desired surface. When using a self-drilling screw, it is necessary to drill a hole in advance. Self- drilling screws are available in a variety of finishes with unique product features to suit a wide range of environmental conditions. They are made of stainless steel or carbon steel. Candorr Self Drilling Screws available in Hex Head with EPDM washer are used in insulation work, aluminium fabrication, roofing work, furniture work etc