Yes4AllJ-Hooks Barbell Holder for Power Rack - J Hook Weight Rack/Fitness Racks J Hook (Optional: Fit 5x5cm, Fit 7.6x7.6cm)

The j-hooks are pretty solid and I can confidently say that I feel safe under them when I have my barbell loaded with plates. The plate holders as you can tell from the picture does it job and does not not slide off.

I bought two sets to go on my 2x2 squat rack, and they fit just fine.The J-cups feel solid, the welds seem decent, and they are a million times better than the cups that came with my rack.Only hiccup on these are the stabilizer screws at the back. The threads get paint in them and I've had to chase them with a tap before the screws would operate smoothly.The weight pegs are good enough, nothing noteworthy besides that they function exactly as intended

I've only done a few workouts with it so far, but it's a great addition to my R3 Power rack - makes doing landmine rows and presses a cinch. I wouldn't use a very nice/expensive barbell with it because I'd be worried the tension screw may scuff up the sleeve of the barbell, but it's a solid piece of gear.

Gotta tell ya, these items are way better than I expected, especially for the price. I bought these to use as upgrades on a Fitness Reality squat rack and I am NOT disappointed. These are heavy weight, very secure once attached, and well built. I will order another set once I get my hands on some more weight. Nice to be able to keep the plates organized, and the bar on the rack. Must haves people, at a great price for the sets.

I bought these to go with my fitness reality rack about 4 months ago. They fit perfectly and are very well made, no complaints. To be honest the j cups are better than the ones that come with the rack.