Jayflex Hyperbell Dumbbell Converter - Convert Dumbbells to Barbell Set and Kettlebell for Home Fitness - Adjustable & Up to 200 lb Capacity Weight Barbell for Weight Lifting

Works well on Nonzero Gravity Power Dyne Adjustable Dumbbells (also bought on Amazon). Fits just right over the handles. Nice and snug. Keep in mind, since the ends are dumbbells and not normal weights (where the weight would be centered on the bar) any movement or rotation of the bar feels different/strange compared to a normal barbell. This is because these being dumbbells on the ends, the weight extends beyond the center of the bar unequally (as opposed to a regular barbell where the weight is over the bar evenly around the bar because its in a circle). So any natural rotation of the bar creates momentum that you feel in your hands. Didn’t expect that, but makes sense and should be expected. It’ll be something to get use to. You’ll understand what I mean when you start using them. Otherwise, seems to be the next best thing to having an actual ez-bar and now I have more uses for my dumbbells and more exercises to work with.

Perfect addition to my gym. I've recently downsized the equipment I use, now with the Hyperbell Straight Bar, EZ Curl and Kettlebell I can fully utilize the dumbbells I have. I also us some magnet add on weights, that attached to the dumbbells to make increasing set weight quick and easy and maximize the workout. Silent---No rattling plates to wake up the family on those early or late night quick pump sessions. Love it. Strong. Easy to use. Great Customer Service.

This is a brilliant piece of equipment however there’s one specific thing that stands out that could be better. The grips for the dumbbells are nice and hold them tight (they do only work with cap dumbbells as I’ve tried others and it will not fit. My main observation is that the collars that screw on the grips for the dumbbells are plastic and not very thick plastic at that. They are a major weak point in the design. If the collars were metal instead this would be a perfect design but instead they’re rather thin plastic and for the price of this it’s going to be a point of failure eventually in an otherwise stellar piece of equipment. Here’s hoping they sell replacement collars.

"The Jayflex Hyperbell Dumbbell Converter is like a superhero cape for your dumbbells. I turned my average weights into versatile monsters, ready to pump out some serious reps. No need to clutter my space with bulky barbells or a dozen different setups — just attach this bad boy, and boom, instant upgrade. The attachment is solid, and it holds up to intense workouts without wobbling like a toddler on roller skates. Now I can bench, curl, and press like a beast without even leaving my living room. Plus, it’s compact, so I don’t have to explain to guests why my home gym looks like a fitness warehouse. If you want to level up your workouts without blowing your budget, this is your go-to. 5 stars — my dumbbells have never felt more powerful!"

Great dumbbell bar kit, quick and easy to switch dumbbells and they fit quite securely. Very solid construction, highly recommend! If you have dumbbells and looking to take them to the next level this bar will do it.

Love the idea for this product. High quality plastic. Rings are a bit hard to put back in place and screw, takes me a while, which makes me not motivated to change weights often during the trainings. But nonetheless, it’s a game changer tool for me in the gym.

Seems to do a pretty decent job so far but have only used it for 10s and 20's. I don't know how I feel about putting something with much more weight in there as the clamping piece is all plastic. I wish they just used metal throughout even if they charged a bit more. Just seems with plastic, that type of stuff always ends up getting brittle over time, warps and breaks. The thin little red collar part seems especially lightweight and not sure how it will hold up over time lifting and putting the bar back down. They should have at least made that piece metal. And if the red piece breaks, then what? At the mercy of the company selling you a replacement part at elevated cost + s&h - if they even do at all. When swapping between weights, it's not really a quick and easy process either. I was reallllly hoping that it would work with my set of power blocks so then I could just quickly swap weights on the power blocks instead of unscrewing the clamp everytime, but the clamp part is just too bulky and can't fit in there; I would need to dismantle the power block handle which itself would be a pita to do every time. For what it is, it seems OK but could def be improved quite a bit. Hope it doesn't give me problems which it looks like it has the possibility to down the road.

This is a very good product it's built well and it has the perfect curves in it to grip multiple ways to do multiple types of muscle workouts I'm very pleased with this purchase I highly recommend this curl bar