Electrical Knock-out Bushing

This is a bushing that snaps into a standard 3/4" knock out steel electrical box. (these are the knockouts that measure 0.9") This is tested and working with PLA on the Makerbot Replicator 2.

We made it so we could use it with 3/4" conduit to make slide rails for our motorized camera slider. Post a response if you found another use for it!