(46900)1/4 x 4" PFH 100 pk Concrete Screws

The cost is way below that of any competitor. Th kit includes the screws, a drill bit of the correct diameter and length, and a #3 Phillips head driver for your driver. I use a battery operated impact drill to drive the screws and they go in like a hot knife through butter. Everything you need is included. I have used these screws in various sizes and lengths for several years and nothing has broken so far.Best deal in town for attaching items to concrete.