The ARES Tool 208-pc Impact Security Bit Set, No. 31023, includes one quick-release bit holder, one magnetic bit extension, one socket adapter bit, 20 nut drivers, a storage case, and 185 security bits in 1", 2", and 3" lengths. This set includes Phillips, slotted, Robertson, and tamper and standard hex and Torx bits. Additionally, the set has a variety of specialty bits like spanner, clutch, and spline bits for maximum coverage. Made of premium industrial grade S2 steel and heat-treated for enhanced durability, these bits are precision-machined for tolerance and even force distribution, providing a full contact fit and protecting both bits and fasteners from cam out.