50mm CSK Wing Drill Screw LS (Box 100)
22mm Mini Stitcher c/w 16mm Washer (Box 100)
80mm CSK Wing Drill Screw LS (Box 100)
self-drilling tek screws are specifically designed for fixing timber to metal substrates of up to 12mm thick. No need to pre-drill thanks to the sharp drill point, however for very hard substrates a small pilot hole can be used to speed up insertion speed.