Lindstrom 1/4 in. x 2-3/4 in. Slotted Hex Head Masonry Fasteners (100 per Pack)

Concrete Screws Tap Threads Into A Predrilled Hole In Concrete, Brick Or Block. The Threads Are Hardened To Cut The Base Material. The Threads Are Created With A Special Design That Allows For Removal Of The Dust That Is Created While Cutting The Threads.|Requires 3/16 in. concrete drill bit|Use 5/16 in. nut driver|Sold in packs of 100|Corrosion-resistance and long lasting performance due to special blue coating|Pair with corresponding nut and washer in like finishes|Common project applications: electronics, license plates, electrical boxes, switch plates, furniture