The 49-66-5151 Milwaukee SHOCKWAVE Lineman's 3/8'' Drive 5/16'' - 8mm Hex Bit Socket is designed to be the most durable, providing the best access into tight spaces. Their 1-piece design helps these hex bit sockets to better withstand the torque of power tools. A 1-3/4'' hex fastening depth allows these bits to fit the most common connections and hardware that utilities and electricians encounter.
The 49-66-5151 Milwaukee SHOCKWAVE Lineman's 3/8'' Drive 5/16'' - 8mm Hex Bit Socket profile is more compact compared to some competitive hex bit sockets and will fit more connections.