Extension cord under-door pass-thru protector
thingiverse
This pass-through protector comes with a slot designed for a flat 3-conductor extension cord (such as Woods Tri-Way Cord, $10.50 at Target). This enables the cord to safely glide through doorways without getting pinched between the door and doorjamb. To use it, download the STL file and print it out. The "inside" channel has a slight angle to guide the cable away from the door when fully opened. Simply place the protector in your doorway; optional double-sided tape can be used for added security, though it's not necessary. A TurboCAD TCW file is also provided for reference.
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