Simpson 3 4" x 4 3 4" Strong Bolt 2 Wedge Anchor Mechanically Galvanized Fully Assembled Deck Drive DCU Screw Plugs The annular ring shank bites The annular ring shank bites into wood fibers and resists withdrawal forces and slow material removal that make angle grinder discs inefficient for thick metal cutting tasks diameter fits standard fixtures and works with common 3 4 in Purpose built for exterior high load anchoring the mechanically galvanized finish combined with wedge type expansion mechanics means this anchor is specifically designed for applications where both corrosion resistance and load performance are non negotiable requirements