External Hex Washer Head Masonry Screw Assortment in Plastic Tray (160-Pieces)

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|Kit includes 160-pieces of the following slotted hex washer head masonry screws: 3/16 x 1-1/4 in. 15-pieces 3/16 x 1-3/4 in. 15-pieces 3/16 x 2-1/4 in. 15-pieces 3/16 x 2-3/4 in. 15-pieces 3/16 x 3-1/4 in. 10-pieces 3/16 x 3-3/4 in. 10-pieces 1/4 x 1-1/4 in. 15-pieces 1/4 x 1-3/4 in. 15-pieces 1/4 x 2-1/4 in. 15-pieces 1/4 x 2-3/4 in. 15-pieces 1/4 x 3-1/4 in. 10-pieces 1/4 x 3-3/4 in. 10-pieces|Corrosion-resistance due to special blue coating|Clear plastic case for easy storage