While we are at it, I may ask you guys another question.
Hope you don't mind.

The other day, my son and I were working in the garden, and the shovel handle broke at the connection point. I bought two other shovels, but kept thinking about the broken one. metal part is almost new but the wooden handle is broken. My question is that if I cannot find a replacement handle in the market, what is the best way to improvise ? Should I smoothen the broken handle and utilize what is left of it ?? Or should I buy a 2x2 piece of wood and improvise it as a handle ?

I will keep looking for a replacement handle in our local market, but it doesn't look promising.

I think a 2x2 would flex too much to be useful as a handle.

Handles are usually hardwood, not soft like construction grade lumber. What quality is the shovel with the broken handle? If it is a cheap shovel the replacement handle will cost more than replacing the shovel. While I don't like disposable tools, sometimes it is more cost effective to throw away a broken tool and buy a new one than it is to repair an inexpensive one.

My 2 cents:
Use a sledgehammer head.
That's sounds like a coal shovel.
Shovel handles used to be made of Ash around here. Hickory or Locust will work, too.

You can use a cement walkway, driveway, and/or curb for a light duty anvil.

Also, you can straighten a nail in your small vise that doesn't have an anvil. Just clamp it in the vise, either all the way in, or clamp one end with the rest sticking out then hammer that end until straight.

Or, you could just buy an assortment of different nail sizes, then you won't ever need to straighten bent nails. That would be cheaper than buying a bigger vise with an anvil. I have both.

the corner piece of a chep pallet. about 4x4 and kinda hard. (i work in a warehouse and we dont really have tools so we have to improvise.) or what I have done is clamp it in a good vice-grip and use a railroad tie step at my folks place. for straightening nails honestly wood is better than metal. if you the need the strength of metal I would ask around at machining shops or welder buddies, an I beam or solid c channel should do ya. prolly free if you are friends. also you can use your hitch in an pinch.