door lever/knob

thingiverse

My cats figured out how to open the garage doors. I put up a new door lever, but they still managed to get it open somehow. So I came up with this special knob. It's made for European-style door levers like the one from WB brand. The original part costs about 15 euros. There's a hole for a shaft that's roughly 7 mm in diameter. You'll need to drill your own hole for the screw, making sure it's just a little smaller than the screw itself. I designed this knob using tinkercad and then sliced it with five layers of perimeters.