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This is a genuine DeWalt 1/2" capacity Keyless Drill Chuck. This Chuck, 330075-74, replaces the 330075-64, 1/2" keyless drill chuck and is compatible with many DeWalt cordless drill models. This chuck has a Tough steel and nylon construction but is also light-weight and provides comfort while the keyless single sleeve construction adds efficient easy to use keyless bit swapping, while the ratcheting action locks the jaws tightly to reduce the bits from slipping. (No need for chuck keys or manual tightening).
Chucks are commonly replaced parts in tools, if your drill's bit retention is failing, the rotation feels stiff, the chuck has seized up or the chuck doesn't lock you will need to replace your drill chuck. This light weight 1/2" keyless drill chuck has a 1/2" bit opening and mounts on 1/2" -20 threaded spindle shaft only.
This 1/2" Keyless Chuck will fit the DeWalt following models: