One of our most-popular hardware assortment sets with professional contractors used to spending the same amount for just a dozen bits. Set includes 18 different styles and sizes: Phillips: 6 each #1, #2 and #3 head, Slotted: 6 each 4mm, 5mm and 7mm, Torx: 6 each T10, T15, and T20, Robertson: 6 each #1, #2, #3, Pozi-Driv: 6 each Pz1, Pz2, and Pz3, Hex: 6 each #1, #2 and #3. See-thru organizer case to keep it all in. For 25mm bit attachment.