Secure your projects with ease using the Hillman 375311 Phillips Flat Head Concrete Screws. This 100 pack of 1/4 by 3-1/4-inch screws comes with a convenient bit for effortless installation. With a blue perma-seal coating and impressive strength of 4,000 psi in both tension and shear on concrete, these screws are your go-to choice for reliable fastening in Caribbean conditions.