Wedge Anchors(Thru Bolt)Features:Dril bit sizes same as stud size. Easy expansion with the anti rotation lug on the expansion Clip. Different length of thread to afford adjusting with shims on site. Uses:Scaffolding brackets, Cladding support, Brackets, Fire, Water and Sewerage Pipe brackets. Base Material:Concrete, Hard Stone. Material:Carbon steel, electro-galvanised to 5 micron. Hot dipped galvanised, SS 202, 304, 316.