Sometimes with small diameter drill bits you are better off using your hand to tighten the chuck rather than using a chuck key because if the bit grabs and the chuck was tightened with a chuck key, the bit may break.

Question

Quizplus · Accepted Answer

When using small diameter drill bits, tightness can be easily achieved by hand tightening the chuck rather than applying too much force with a chuck key which can cause the bit to break if it grabs. So, it is always recommended to use your hand when tightening a chuck with small diameter drill bits.

Sometimes with Small Diameter Drill Bits You Are Better Off