Each extension is made from 6140 Chromium-Vanadium.
Pinless Universal Joint
The ball/tang is made from 8660 Nickel-Chromium-Molybdenum, and the socket is made from 4140 Chromium-Molybdenum.
The adapter is made from 8660 Nickel-Chromium-Molybdenum.
The reducer is made from 8660 Nickel-Chromium-Molybdenum.
Drive Tool Retention
Each accessory works with both types of anvils found on 3/8 inch drive impact wrenches:
Friction Ring Anvil
Detent Pin Anvil
3/8 Inch Drive All Accessories Set (6-Piece)
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