扳手，車床夾頭，8 mm 方形，長手柄

The long handles on this chuck key give me way better leverage than the stubby one that came with my 3-jaw chuck. It’s a simple upgrade that makes tightening and loosening the jaws noticeably easier, especially on deeper workpieces.

Finally a key that fits my 3-jaw chuck without hunting for the right size, the 8mm square is spot on. The long handles are a lifesaver when I need a bit more leverage on stubborn workpieces. Much easier on my hands than the stubby one that came with the chuck.

The long handle gives me way more torque than the short key that shipped with my 3-jaw chuck—no more fighting to tighten the jaws. It fits perfectly on the 8mm square drive and feels solid in the hand.