Profile: Security Fasteners and Fixings UK specializes in security fasteners and fittings. Our products include fourtress, security construction fixings, power drive, tamper drive, self drilling screws, mesh-clips, electrical screws, shear nuts, security nuts, saddle bolts, cup square bolts, shear bolts, and security screws. Security construction fixings are ideal for security grills, machine fixtures & guards, and hand & guard rails. We provide security bolts, tamper-proof screws, tamper-proof nuts, tamper-proof bolts, tamper-proof security fixings, and security fasteners. Power drive reduces labor costs dramatically, and eliminates the need for nut inserts & shear nuts. Security screws include two-hole self tapping screw, crutch head self tapping screw, Pin-Hex self tapping screw, and Pin-Trx self tapping screw.