Summary I needed 15 cable holders to hold the TV aerial cable in its new position. The hardware only sold packs of 25. So instead of wasting money and having no use for the extra 10 units, I decided to print only as many as I needed. Instructions Pretty simple hop into the openscad file, put in your required dimensions, print only as many as you need, when you need them so they don't get stored and forgotten in some organiser draw. Place a small nail in the hole at one end of the holder and bang away to secure that cable. The STL file included is for a 6 mm cable (I found if you slightly exaggerate this dimension it works better).