Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: does this keep the bag from spinning? and does it lay on the floor or hang under the bag?
Document: I use this with a 100lb bag to help keep it from swing so much. It that retrospect it works great. The bag anchor sits on a padded floor but, after awhile it well wear at the bottom and start to leak. It takes awhile but, I am on the third one. What I did on this one was to use a sand bag instead of water and cover the very bottom with a good grade of duct tape.
I'll keep this short:I'm trained in 4 disciplines so I've had my fair share of bag/bag accessories-abuse. Roughly 1 month ownership.Pros:- Does exactly what it's supposed to do: sits on the floor, keeps the bag from going insane.- Durable- Fill it with one bag of playsand from home depot for $3 and you're good to go.Cons:- The design needs work.
I bought this for my 100# heavy bag. The item is well built and fairly easy to fill with water or sand. IAlthough probably adequate for your standard size individual, it is not heavy enough to keep me from banging the bottom of the bag against the wall 30 inches from a wall. I hit he bag and the bag moves and drags the bladder along with it. I will use  he bungee and a large hook mounted in the floor to prevent this event  n the future.
Strong and durable. Water is easier but sand seems to keep it more stable and helps the heavy bag keep from jumping.
I bought mine with the Everlast 70 Pound MMA Heavy Bag, and it works great to keep it stable.
This helps to keep the bag still to a certain extent but the bag will still move some. It is better than letting the bag swing free for sure.
Worked ok, bag still moved quite a bit but it was a big improvement for my freestanding punching bag. Should probably also use some plate weights to keep the stand from rocking so much. SY
I haven't had any issues with this bag although most Everlast products just don't seem to Everlast if you know what I mean. I will keep a close eye on the stitching and some of the other parts of this bag. A must for a double end bag.
This is a sturdy bag weight that helps keep my punching bag centered and not swaying around. If you purchase this I recommend that you fill the insert with a small amount of water before sliding it into the cover sleeve. Once in the sleeve go ahead and fill it up and get back to working out.
Does what it should. I keep my bag out in the garage and its not heated so for winter I didn't want to fill it with water. Simple answer buy a half cubic foot bag of play sand and it fits right inside without even opening the sand bag you even have a little room left over.
Answer: yes