Nova Fasteners 1/2" x 4-1/4" Stud Wedge Anchor - Steel - Zinc - Pkg of 25

1/2" x 4-1/4" Stud Wedge Anchor - Steel - Zinc - Pkg of 25 Anchor diameter equals hole diameter. Comes complete with nuts and washers ready to use. Collar expander offers optimum contact with masonry. Projections on collar immediately grip concrete. Collar design expands on first turn of the nut. Easy to install through object to be fastened.