Lamp Switch Knob

Made this knob to make turning on/off some lights easier. I have trouble using my hands from carpal tunnel and turning lights with the "Easy on off" style knobs is hard. This makes it much easier to turn and can be adapted to fit any size lamp. Center hole diameter is 5.08mm size up as needed, I heated the shank of a drill bit to make the inside pla soft then pressed it onto the knurls of the lamp so it holds well.