VEVOR Thickness Planer Blades, 13-inch, HSS Crafted for Durability, HRC55-60, Easy Installation with Pre-drilled Holes, Ideal for Woodworking, Home Projects & Industrial Use, 3-Pack

The key to the Vevor planner is due very thin cuts to begin with this saves the blades life. To replace the blade it's really quite easy to look at it you can see how it turns apart. To get replacement blades the only place I've been able to find is through the manufacturer. The manufacturer their customer service ain't that great so that is the only place I've been able to find replacement blades. I believe they want you to send the old blades in before they send a new ones.

I don't see a question. If you're asking can the blades be replaced, then yes. The machine comes with a tool to set the depth of the blade, I also understand that blades for another brand can be used. Not sure but think it's the delta brand. Hope this helps. You can also sharpen the originals.

Yes, it will work on M1B-LS-3302.

Didn't change the blades. I used it to plane about 8 boards and re sold it

The inner length between the legs is about 19 inches and the outside distance between the legs from outside edge to edge is about 22 inches.

It’s literally in the description

No, the machine comes with a tool kit.