Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: One of the clamps holding the bar up is too weak when engaged and the backdrop keeps slipping down.  Is there a way to tighten it?
Document: I received my backdrop stand and immediately put it together. I noticed that one of the clamps would not tighten (it was cracked). I emailed cowboy studio and attached a photo and received a response before 10:00 am on Monday. They are shipping a replacement. No questions, no delays, no hassle. That to me is great customer service and definitely keeps me as a returning customer! !
Just got this and so far this thing is amazing. It comes in a great carrier with individual slots for each pole and stand. The stands and bar are super durable and lightly spring loaded. Everything about this stand screams high-quality and I would expect it to cost way more. I wasn't expecting much but think this thing is great!
I have used this backdrop 3 times now and it seems very sturdy when holding up my muslin backdrops and even seamless paper rolls. I would recommend this to anyone who needs a portable studio.
I was looking for a portable background support system to use at home as well as on location to do some portrait photography work. I looked at several models and read many reviews, but could not decide on one. There were some models where the support bar would sag under the weight of the fabric or paper.I asked my brother (a fellow photographer) if he knew of good system. He suggested Cowboy Studios.
I was rummaging through their home decorating clearance table and found a nice slightly textured fabric in a pale pink color. Because of the extra yardage I had, I can drape this fabric over the support bar without any problems. Eventually, I will sew up a pocket at the top of the fabric, so I can slide the crossbar through the pocket and let the fabric hang.I'm not in a rush, but I'm looking at other backdrop colors that I would need.
One of the four crossbar section had some scratches, but it's not an issue as it doesn't appear to be snagging my fabric/backdrop.The heavy duty spring cushioned light stands are easy to setup and adjustable in height.
I knew which one I wanted...the Cowboy Studios Premium Background Support System (901). I did a search on Amazon and came up with several different models. I searched on "CowboyStudio backdrop 901" and was able to find the system.This heavy duty 10 ft crossbar studio background support system came in a carrying case and shipped in a box.
I ordered this in a rush, two weeks before a party that wanted me to have a background stand for their custom back drop. I took a chance with this one because it was cheap and had 3-5 day shipping. (It was here in 3). Awesome product with some great touches. Very solid and help up like a champ even with a heavy vinyl backdrop on it. It has rubber caps on the bottom of the tripod legs and the bottom of the center pole.
Very sturdy stands and adjustable cross bar. Travel case is well built. Shipping container was very sturdy. No instructions needed to assemble product.
A little unexpected bounce, and you have to push on the top to compact them to their smallest height. I was expecting air-cushioned, but I don't think Cowboy Studio advertised either way. * The rubber feet on the legs are simple rubber disks, maybe 1/4" thick. I'm worried that at the wrong angle the metal legs could contact the floor, and potentially scratch it.
Answer: I had the same issue. Just tighten the bolt on both sides of the spring!