Bolt M10x80 & M12X80 (10 pack inc nuts) - spiked timber fixing for connecting single timber into structural steel eg single sided cladding on floor joists or door lintels *Immediately grips to allow single handed fixing; *wont turn or pull through timber; *easy to use in tight spaces; *compensates for overdrilled holes; *no countersinking required before boarding; *guaranteed Building Control quality joint every time