Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: How well do they work to support a King sized bed frame?
Document: I have read many reviews saying the bedframe punctured right through the risers. These risers are intended on being used with casters. Make sure your casters fit well into the risers. On my bed frame, the &#34;stops&#34; on the casters made the casters not sit right. I had to replace these casters. Lowes sells bed casters very cheaply.Make sure a riser is under every support. for this you may have to buy two sets of these.
Stronger than expected from descriptions offered on website. Material is quite thick, offering sturdy support for the average bed, even king-size..
Works great under my king size bed (be sure to buy 2 packs as you will need 6 risers). My husband and I are not what you would consider &#34;small&#34;, and these are holding up quite well.
I had 3 people in my bed, well under the 1300 lb rating and one of the bed legs broke through the support. There wasn't any horseplay going on when it broke. I'm ordering again, hoping that it was just a flaw with one of the legs. It also doesn't come with 5, which most beds have cross-bracing with a leg in the middle.
I bought these and some cheaper once and I cannot tell which one is which. They both are very sturdy and work just great. I have a King size bed that is why I bought these and the other cheap once because I needed 6 and they only come in 4, but I would recommend if your looking for some.
The blocks are holding up our california king bed with no problem. The extra height gives us the ability to really clean under the bed and add needed storage. I debated between these and wood risers. I thought the wood would be stronger but finally decided that they might split. Very happy with product. A 21&#34; bed skirt covers them well.
These work great on the bed, my legs still dangle when I sit on the edge but that's fine. These also feel very sturdy and the bed feels secure on them as well. As sturdy as it felt when it was just on the floor...only difference is the height of the bed.
These are huge. Not only did they raise the bed so high that it was impractical, but they are just bulky and kind of silly looking. They are certainly sturdy though, and do allow you to store things more easily under your bed. I ended up having to buy two sets because I didn't think about the fact that my queen bed frame had more than just four legs, it had an extra two in the middle for support.
Thought just propping up on the corners would be good, but nooooo those extra support legs/wheels are important too! LOL would not have been good at all to have our bed frame break in the middle of the night! x_xAnyway, during the time the 4 were under the corner wheels it was easier to make the bed, clean under the bed, place larger storage containers underneath, etc.
These work VERY well!! They are easy to use and I would purchase them again. The price was right also.
Answer: Not a problem. I have used them for about 6 months and it supports my family, a cumulative 500lbs or so, frequently with no problems.