Firstly - they are a prick to use.
Many coils do not have the mounting slot pressed properly into them - meaning you have to force the coils onto the stakes - usually bending the "mounting spike" on the holder.
The design of the stake holders, makes it hard to pick up the coil and stake, and either place them somewhere or move them from room to room.
If you stick the coil and stake on a plate to catch all the ash, they have a real tendenncy to tip over when you do move them.
That said, I got sick of the "bottom dollar" bullshit design, and came up with a permanent solution to the holding, use and transportation of mosquito coils.
Step 1: The Dreaded Slit for Poking With the Pedestal
Step 2: The Beastly Mounting.
Step 3: The Solution of the Century - the Bulldog or Folding Clip
Easy to clip onto the coil.
It has handles, so you can pick up and move the coil.
It's reasonably steady, and a bit heavier than the steel foil stand, that came with the coils.
And it lasts a life time.
Step 4: The Benefits and Limitations of This Device and Mosquito Coils.
The instructions in Indonesian, are to light the coil, and leave it in a room, long enough to clean away the mosquitos and to then put the coil out.
I was for a time, under the delusion that your supposed to light it and live in the smoke that infiltrated the house.....
Kind of like an insecticidal incense stick.
But no. They are a "clear the mosquitos out and then move in" sort of an arrangement.
The Benefits - where I live the mosquitos mobility and activity are very dependent upon humidity, temperature and sunlight.
So if we are going to have them, they usually become active around 2 hours before sundown and for the first few hours of the night.
What this coil holder does, is that by figuring out the burn time per distance of coil, one can "time the buring of the coil and it's self extinguishing" as the lit bit burns up to the metal clip - which draws the heat out of the glowing coal, and puts it out.
This is a good thing in some locations for some people.
If I wanted to have the coil burn for an hour or so, I'd leave about an hours material on one side of the clip and then it would burn to the clip and go out.
Of if I wanted to have the coil burn for long periods, I could occassionally move the coil around in the clip to keep it burning for as long as I wanted.
One can also simply use the clip to extinguish the lit coil by clipping the ember, and putting it out.
The ONLY down side, is that if your living in a building that has lots of gaps where the mosquitos can get in i.e. no fly screens or netting, there are lots of mosquitos and they are the types that carry nasty diseases - and you really want the coil to burn all night, then unless your prepared to sleep light or take turns adjusting the coil in the holder, every few hours, it's probably best to use the traditional cheap stake type coil holder that came with the coils....
But then again, the folding clip type coil holder, gives the advantages of portability, stability and control of the burning time - where as the basicc stake stands are designed to let the coil burn in it's entireity.
Anyway this arrangement suits me as I can light the coil, for an hour or two before sundown, and use the intake fan to blow the very diluted insecticidal smoke through the building, which also stops the mosquitos from coming inside every time I need to go in or out of the doors etc...
And when I go in for the night, I can easily extinguish the coil, rather than waste it.
So this arangment might really suit you too.