5/16" x 1-1/2" Outer Diameter 5/8" Double Expansion Anchor, Zinc Plated Double Expansion Shield Anchors, Double Expansion Shields for Masonry, Concrete, Brick or Block Qty 50

Material: zinc alloy concrete anchor for masonry screws or bolts. | Style: two-piece tubular shield, hollow wedge cone and wedge nut. Tightening of screws leads to expansion at both ends. | Application: for soft masonry with mechanical screws or mechanical bolts.It can also be used for harder materials, including stone, brick, concrete or blocks. | Use: easy to use, firm and good