How to Change a Dremel Bit: 12 Steps (with Pictures)
#0183;#32;Press down and hold the button on the side of the Dremel near the chuck nut. The chuck nut is the outer metal part at the tip of the Dremel that holds the bit. Look for a small button on the side of the Dremel near the chuck nut and hold it down. This button is a security lock that will allow you to loosen the chuck nut so you can replace the bit.