this is a great attachment for the money. you can use three different hand positions. built quality is great, it's relatively lightweight, and the handles are interchangeable for different diameter options. i bought this to replace the standard grip triangle handle, but these are wider so i kept my old one for closer grip work. still very happy with the addition. it sees a lot of use.

honestly, i love these urethane dumbbells. the straight 34mm handle (50lbs+), and the knurl feel great in use. you can drop them without worry. they look great to me. i got them for a price i couldn't refuse used but i'd never pay retail for them. absurd cost for essentially the same thing that a bunch of other companies sell for less (but still a lot). premium product for sure, but still overpriced.

i enjoy these collars quite a bit. there is nothing to flip or turn. just push them and they lock automatically. pull them and they come right off. they are easy to use, hold the weight perfectly, and they look and feel good. they do not work on axle bars and they are a bit expensive but i use them over my other options.

I'd skip these unless you can get them for about $10. the plastic is slippery and doesn't feel great. they are a pain in the ass to put on but they do stay put. they should develop a similar product but just a thin tpu block you slide a slotted steel handle onto after installation. ok in a pinch but i don't use them.

if you don't need this yet, you will. go ahead and shell out for the dual, or at least the double. but probably the dual double double. it's highly functional, decorative and priceless in it's ability to justify more barbells.