IRWIN® bits are manufactured from industrial-grade tool steel
Bit set is tested to meet the highest standards for hardness and torque
2" socket adapters: 1/4", 3/8" and 1/2"
2" power bits: #1 Phillips, #2 Phillips, #3 Phillips, #1 POZIDRIV®, #2 POZIDRIV®, #3 POZIDRIV®, T8 TORX®, T9 TORX® and T10 TORX®
3-1/2" power bits: #1 Phillips, #2 Phillips, #3 Phillips, #2 POZIDRIV®, T15 TORX®, T20 TORX®, T25 TORX® and T30 TORX®