this is a replacement for the typical IKEA style cammed tenon or cam lok hardware found in much of the cheaper furniture today. Essentially, it is a way to convert this type of joint to a classic through bed bolt. I decided to design this when my bed collapsed. see: http://itisaprocess.tumblr.com/post/128341307505/i-am-not-usually-one-to-gripe-about-crappy. EDIT I made a parametric version: http://www.thingiverse.com/thing:1028081