I own a few COC grippers including the guide, sport, trainer, 0.5, 1.0, 1.5. The build quality is excellent. The knurling is excellent. I had some of mine tagged by Canon PowerWorks which I would recommend if you are doing any contest prep. As a grip builder and something to play with between sets, there is no point to get them calibrated.

I bought these expecting to use them all the time. I used them exactly once. Now they are a decorative item in my gym. I decided to go ahead and buy an axle bar instead and I am very glad I did. While these are a great space savings solution, I would highly recommend an actual axle, unless you are preparing for a specific competition like ArmLifting USA.

I had been looking for a circus dumbbell for a while. I had a few criteria. First, I wanted something relatively light empty. Second, I was not willing to pay $300+ for something new from a major retailer. My bell weights 58 pounds empty and that is a pretty good weight for me. Build quality is fine, but these are not indestructible. I would highly recommend some crash pads for setting these down on and even then, they will bounce and bend if you are not careful. Nice piece of kit and I am glad I found it on Facebook Marketplace for under $100. No idea who the original manufacturer is.

I bought these planning to use them for hip thrusts, elevated deadlifts and floor presses. As it turns out, I have not used them at all. I got a good deal picking them up for $100 on Facebook Marketplace, but you do not need these to get big and strong.

I have the 2X aggro bar. The knurling is really good for powerlifting. It has a little more bite than my Texas Power Bar, but it is not uncomfortable. I would not use either for Olympic Weightlifting or CrossFit movements. Value wise, I think it is overpriced. However, I have no performance complaints. I also have yet to have a build quality issue with any Rogue equipment.

I bought these to micro-load plate pinches and they work great. For example, I can pinch two 25's, but not two 35's. These bridge the gap by allowing me to load 2.5 pounds at a time. The retail price point is high, but I found them used. The build quality and performance is amazing. They are indestructible.

I wanted to use this much more than I actually do. I like hip thrusts as a movement, but rather than grabbing this, I will typically just use the nearest bench. I also thought I would use it for Bulgarian Split Squats, which I often do not do often enough to own a dedicated piece. The build quality and foam density is great. The retail price is high for what you get, but I bought one used. I will probably sell it.

I use this in my basement gym. The space is set up so I can use a 7 foot barbell, but this is much easier to work with. Using iron plates, I never exceed the sleeve width. It is also a bit of a mental challenge as the bar is 30 pounds and my brain is conditioned to do plate math with a 45 pound bar. Rogue build quality is legendary and the knurling is excellent.