【Set Contents】You will receive totally 300pcs screw set with 5 types of flat philips head concrete screws：3/16"x 1-1/4", 3/16"x 1-3/4", 1/4"x 1-1/4", 1/4"x 1-3/4", 1/4"x 2-1/4", 5 types of hex head cement screws: 3/16"x 1-1/4", 3/16"x 1-3/4", 3/16"x 2-1/4", 1/4"x 1-1/4", 1/4"x 1-3/4" with high-low threads. Includes 2 drill bits with 5/32"(4mm) and 7/32"(5mm), 2 screwdriver bit with 1/4"x65mm and 5/16"x65mm, 2 phillips drive bit with PH2x50 and PH3x50. 【Wide Applications】Suitable for use on concrete, masonry, cement, blocks, and brick walls. Ideal for homes, workplaces, furniture, and outdoor spaces. 【High-Strength Material】 Made of 22A carbon steel, ensuring strength and durability. Exquisite plastic box made of new pp materials, with clearly divided inserts, making your selection more concise and convenient. 【Surface Treatment】The screws feature a blue rust coating, resistant to hydrochloric acid corrosion for 1000 hours. Enable screws to last longer and prevent corrosion. 【High Cost-Effectiveness】 Heat-treated to make the screws stronger, more penetrating, and more durable. Make these screws reusable and save money. 300PCS Concrete Screws Kit, includes 2 drill bits, 2 screwdriver bit, and 2 phillips drive bit