This kit contains five of our most popular self-tapping screw sizes for pocket hole joinery. Use a 1" screw in 1/2" thick stock, a 1-1/4" screw in 3/4" stock and a 2-1/2" screw in 1-1/2" stock. Kit contains. (150) SPS-F1, (150) SPS-C1, (150) SML-F125, (150) SML-C125, (75) SML-C250W. A total of 675 screws