T15 Torx -1 inch Length - 15 Pack -Through Hardened Insert Bit Tip FREE SHIPPING SAME DAY ON ALL ORDERS IN BY 3:00 PM - NO MINIMUM Impact rated for Cordless Electric Drills - Premium S2-1Mod3 steel. CNC cut for High Torque Impact applications HCH Through-Hardened tempering process. Manufactured to ASME B.107 Standards