Flashlight Stopper

thingiverse

This device slips over round flashlights and similar objects, preventing them from rolling away on sloped surfaces by transforming their circular shape into a square at one end. Make sure it's scaled accordingly to fit your specific flashlight model. The teeth should extend about 10-20% into the outer frame for optimal grip. My measurement shows a diameter of 5.2cm. You can see the distances marked in one of the images, and I must admit that it was quite a tight fit. Depending on the material used, you may need to measure from a slightly more interior position, especially if your flashlight is made of ABS plastic, which tends to be slightly more flexible than PLA.