50-count of:SPS-F1 - 1" (25mm)SPS-C1 - 1" (25mm)SML-F125 - 11/4" (31mm)SML-C125 - 11/4" (31mm)75-count of:SML-C250B - 21/2" (63mm)Screw Diameters:#8 - All SML coarse-threaded screws (with the exception of stainless).#7 - All SML fine-threaded screws and all SPS coarse-threaded screws.#6 - All SPS fine-threaded screws