Heeyoo Upgraded Dog Poop Tray and Rake Set, Pet Waste Removal Scoop with 37.8 Inches Long Adjustable Sectional Stainless Handles

What are the dimensions of the tray?

How much does this product weigh?

I attached the two poles to the third but can't place the end of the pole into the scooper. the pole seems too tight to fit. Can I get some guidance?

Is the rake sturdy enough to withstand scooping in rocks?