The 3/8 x 6 Titen HD® Heavy-Duty Screw Anchor 316 Stainless Steel (50) are designed for use in concrete and masonry projects

and the box contains 150 screws per pound

3/8-16 x 6 Grade 8 Hex Cap Screw Plain Domestic USA (50)

3/4-16 x 2 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25)

it is ideal for concrete and other masonry materials

#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 The 3/8 x 6 TitenThe #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.