The SHOCKWAVE™ Impact Duty Hex Socket Adaptors are built for maximum strength and durability using proprietary steel and an advanced heat-treat process. Their heavy-duty construction delivers reliable fastening performance in high-impact applications and is designed specifically for use with impact drivers and drill drivers, not wrenches. Tested for use with MILWAUKEE® 18V impact drivers, they support torque levels of up to 226 Nm for dependable job-site performance.