MultiPro Quick Change Keyless Chuck Replacement for Dremel 4486 (Thread: 9/32-40) by Wadoy

Fits for Dremel 4000, 400,3000, 398, 395, 300, 285, 275, 200, 100, 8200, 800, 780, 770, 7700, 750. It ONLY fits for genuine Dremel tool. It CAN'T be used for duplicated Dremel tool or Rechargeable Dremel.How to use 4486 chuck on a DremelStep 1 Press the shaft lock button located towards the top end of the Dremel 275 rotary tool. Rotate the shaft underneath the housing cap on the end of the tool, at the same time, until the lock engages and you are unable to rotate the shaft further.Step 2Twist the collet nut on the end of the rotary tool counterclockwise using a collet wrench. Loosen and remove the collet nut and remove any collet from the hole in the end of the threaded shaft on the end of the tool.Step 3Thread the bottom of the 4486 chuck clockwise onto the Dremel's threaded shaft. Tighten the chuck onto the shank with your hand until it seats firmly onto the tool.Step 4Twist the body of the chuck counterclockwise with your hand to open the jaws wide enough to insert the drill bit. Insert the drill bit shank into the chuck. Twist the chuck body clockwise, using your hand, until the jaws fit tightly on the bit.Step 5Set the Dremel's "LO" and "HI" switch to the appropriate setting for the job, if the tool is a two-speed model. Plug the rotary tool's plug into an electrical outlet. Flip the "ON/OFF" switch into the "ON" position.