A complete star bit socket set for all applications Includes 6-lobe standard, 6-lobe tamper-resistant, 6-lobe star plus, 5-lobe tamper-resistant start plus and external star bit sockets. Bits are made from S2 steel to meet or exceed torque specifications. Sockets are made from heat treated chrome vanadium steel for strength & durability. These high quality star bits are designed to be used with hand tools only. The bit socket warranty is voided if they are used with any type of impact tools. ATD carries a complete line of bit sockets available individually.