Fastener needs vary from project to project and the safety and life expectancy of the project can be extended or compromised based upon the fastener used. The Grip-Rite 1/4 in. wire X 2-1/4 in. L Slotted Hex Washer Head Concrete Screws 1 lb 100 pk is a great product for your concrete needs. The hex washer head provides a great grip and the slotted design allows for easy installation. These screws are made of high quality materials and are built to last.