This is a tool to remove the locking assembly from the bean basket of the Cuisinart Burr Grind and Brew coffee maker model DGB-900BCC.

Normally this part can not be disassembled but becomes almost unusable as the grounds start to build up inside. To use it unscrew the knob with a Phillips driver and remove the knob. Now put the coffee key part on the remaining assembly. Flip it over on the counter and press it in place. Now remove the key by wiggling it out while turning. The assembly should slide out for cleaning now.