
The pronounced curvature of the ramps on these deliberately creates a wide range of sizes they can engage, hence the Metric/Inch contraction in the name.

1/2" Drive Metric Double Deep 12 Sided Bi-Hex Sockets 10mm - 24mm 15pc
4.0

Pneumatic Socket Adapter Heat Treatment Impact Resistance Universal Pneumatic Joint for Electric Pneumatic Forging(1/2 Pneumatic Universal Head)