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. The Multi-Fix Bolts are also referred to as thunder bolts or lightning bolts. Features Designed to replace traditional expansion anchors TIMco micro plating (Nano) technology gives a higher resistance to corrosion High-Low parallel threads for ease of insertion and high pull-out values Removable & adjustable non-expansion through fixing Unique concave thread configuration BS7671:2018 IET Wiring Regulations (Eighteenth edition) Specification Size - M16 x 100mm Drill size - 16mm Socket size - 27mm Pack Qty - 10 Trustpilot