Key, Lathe Chuck, 6 mm Square

Finally a chuck key that actually fits the 15/64" square drive on my 4-jaw without slop. The 6mm shaft is machined clean, so it engages immediately and doesn’t slip under load. Would’ve liked a longer handle for more torque, but it does the job snugly.

Finally, a chuck key that actually stays seated instead of wobbling around the jaws. The 15/64" tip fits my 4-jaw chuck perfectly, and the square drive hasn't slipped once even under heavy tightening.

The 6mm square drive fits snugly into my chuck, no wobble at all. Turns smoothly and engages the jaws without any slipping. Exactly what I needed for that 4-jaw setup.