Zinc-plated steel bolts for use in concrete, masonry, metal and wood with washers. Torque-controlled, heavy duty expansion anchor for rapid fixing of steel and timber assemblies, structural components, baseplates and brackets. Load-assisted through fixing, eliminating the need for setting out. Quick and easy to use - simply drill through the work, insert the through bolt and tighten. Yellow chromated for corrosion resistance. Size guide (example): M8 - 8 x 10 x 40mm: (M8 = fixing size; 8 = drill bit size: 10mm = maximum material thickness the fixing will fasten; 40mm = length of fixing).