This fits the common (in the US, maybe other places) broom and painter pole thread. The hole for the screw is 3.7mm. I used a #8 x 2.5 inch coarse thread screw. It does a great job picking up leaves and I would assume trash.
Prints in the about 20 minutes and uses less than 5g of filament. I used 3 perimeters and 10% infill. Printed in PETG so I can store it in a shed without worrying about heat, but PLA should work just as well.
I couldn't find a design for leaf pickup attachments to broom handles, so hopefully this helps others. Please comment if you have ideas for improvements.
The author marked this model as their own original creation.