Finish: Zinc & Clear Cr3+. The Sleeve Anchor Is A Thin Walled Anchor For Use In Most Types Of Masonry And Concrete. A Through Fixing Which Allows A Hole To Be Drilled Through The Fixture For Fast And Simple Installation. Anchor Body Grade 5.8 Nut Grade 8. The Perfect Anchor For Use In Concrete Concrete Blocks Solid Brick Or Stone.PTDFORDIRMAMSAHN12129Z