Irwin pro screwdriver bit set 30 piece contains a mix of popular screwdriver bits and nutspinners the bits are manufactured from high grade s2 steel and are engineered for use in hand drive or power tool applications supplied in a handy carry case comes with 7 x 25mm phillips bits ph11 ph25 ph31 7 x 25mm pozi bits pz1 pz25 pz3 4 x 25mm torx bits t20 t25 t30 t40 3 x 25mm slotted bits 6 8 8 10 10 12 4 x nut spinners 6 8 10 12mm 4 x 50mm double end phpz bits ph1ph2 pz1pz2 pz2pz22 1 x bit