36 in. Aluminum Landscape Rake

No, I think it would just dig into the lawn unless that is what you want. You can do it if you have grass that spreads by rhizomes or you could reseed. I hope my answer is understandable because I don't exactly know what type of grass you have and what is the make up of the soil. I am a landscaper and when I come across a bumpy lawn I just add a little bit of sand like quarter of an inch every month. Over time it gets into the low spots and levels the lawn. If you got lots of bumps and they are due to soil not thatch as you said existing soil then I would consider cutting your lawn to about soil level, smooth soil however you like and reseed or let grow again depending on the grass type

The tines are too short and stiff for leaves.

The Tyned side is for spreading the flat for leveling

It probably can come off in some particular way, I think I remember seeing a nut near some arms from the head of the rake outside ends come up and attach to the handle.

The handle length is 66 inches.

No. I think its more for smoothing out top soil and removing small rocks. That is what I used it for

It can be.

No, either you mean probably Kyllinga brevifolia or kikuyu grass, 2 weeds that are close to what you spelled. You need certain chemicals to kill those weeds. This rake is aluminum and it is made to smooth and level soil, that is easy to move. It's not made to remove weeds it's teeth would bend or break. Hope this helps