This is an adjustable clamp for mounting items to a bed rectangular headboard. 

This model is merely a base, intended to be build upon, either by replacing the knob or adding onto the various faces of the clamp.

Operation 

 Pull up on the knob to to adjust the clamp to the desired width. Push down on the knob to engage the locking teeth on the gear.

Printing / Assembly

• No supports needed.
• Print both jaws with top side orientation down.
• Requires 1  M3 x 10mm bolt.

Notes

• Traced the gear and jaw teeth from LoboCNC's QuickClamp.
• Bed headboard in the photo is for a West Elm bed.