Carbon steel screwdriver bit set includes phillips ph000 ph00 ph0 ph1 slotted 10 15 20 25 30 35 40 pozidriv pz0 pz1 trx t4 t5 t6 t7 t8 t9 t10 t15 t20 hex 07 09 13 15 20 25 30 40 easy grip handle and extension bit holder supplied in a durable plastic case