it is ideal for concrete and other masonry materials

3/4-10 x 11 Socket Cap Screw Alloy

and the box contains 150 screws per pound

7/8-9 Nylon Insert Locknut 316 Stainless Steel

1/2-20 x 2 1/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (50)

#7 x 3 Simpson Trim Head Deck-Drive™ DWP WOOD Screw 305 Stainless Steel (T15) - Box (5 lb.- 490) Square Flat-Head Self Drilling Screws with Wings 410 Stainless Steel it is ideal for concreteThe #7 x 3 Simpson Trim Head Deck Drive DWP WOOD Screw 305 Stainless Steel (T15) is built to provide superior strength and durability. Made of the highest quality 305 stainless steel, this product is rust and corrosion resistant, ensuring long lasting performance. Each box contains 5 lb. 490 screws.