TIMCO MULTI FIX M6 M8 M10 M12 M16 MASONRY CONCRETE BOLTS THUNDERBOLT ANCHOR This stress free, non-expansion through fixing is the new solution for heavy duty anchoring into concrete, brick, stone, wood and concrete block replacing the need for traditional anchors such as throughbolts, shield, sleeve and drop-in anchors.• Designed to replace traditional expansion anchors• TIMCO micro plating technology gives a higher resistance to corrosion and enhances speed of installation• High-Low parallel threads for ease of insertion and high pull-out values• Removable adjustable non-expansion through fixing• Unique concave thread configuration• All steel, non-flammable fixing conforming to BS 7671 standard's 18th edition, which requires wiring systems to be supported by materials which are .