Which ready mixed filler to use for wall render repair?

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I'm looking for advice on a ready-mixed filler to use for repairing a section of wall. I took off a handrail that unfortunately took out a bunch of the render on the wall and has left a big open crack or open surface area that is up to about 1.5 centimeters at its deepest.

I'm wondering what type of filler I can use, ideally something ready-mixed that I can drill into later to reattach the handrail.
 

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SBR to seal it. Buy reading mixed sand and cement. It's dry in a bag so you just add water.
First fill. Let that set for a few hours and then another mix same day.
Use a damp sponge to keep wall clean.
Then you will need a ready mixed filler or toupret powder to fill over that. Then sand.

I don't know of any ready mixed to fill that.
 
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