The 209-piece GEARWRENCH 1/4 in. x 3/8 in. and 1/2 in. Drive 6-Point Standard and Deep SAE/Metric Master Impact Socket Set provides a comprehensive collection of sockets and impact drive tool accessories to cover a full range of fastener sizes from 3/16" to 1-1/2" & 4mm to 36mm. All of the 6-point standard and deep impact sockets within the set feature high-visibility, laser-etched markings and secondary hard-stamped size markings to provide quick size identification. The SAE and metric sockets are made from chrome molybdenum alloy steel (Cr-Mo) for exceptional strength and durability plus a manganese phosphate finish to resist corrosion. The sockets' off-corner loading design greatly reduces fastener rounding. Impact universal joints provide angled access to more fasteners, impact extension bars provide additional reach and access to more fasteners, and impact adapters allow the drive tools to work with additional drive sizes of sockets.