Combo Kit: VIGRUE Large Diameter Concrete Screw Drill Kit contains 42 x concrete screws, Alloy Drill Nut x 3.
Various Sizes: 3 Lengths of 1/4 Bolts: 2" 3" 4"; 2 Lengths of 3/8 Bolts: 3" 4"; 1 most common used Lengths of 5/16 Bolts: 2" ;
Serrated Hex Head: perfect serrated washer head design with anti-rotation serrations to prevent the anchor from backing out.
Wide Application: these heavy duty large diameter screws can be used as concrete screws, brick anchors and masonry screws to provide structural anchoring for indoor and outdoor applications.
Installation: Pre-drill holes using a drill bit(not include), then install the anchor directly using the nut driver.
Strong Material: these concrete screws are made of hardened carbon steel and 13 grade galvanized steel.
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