This 'makes' the mammoth for me. There are things that I think could be refined to justify the price (below), but the functionality and 'quality of use' improvement is bar-none. The handle / adjustments allow you to make huge adjustments to the belt squat / stimulus and even use it very well for calf raises, deadlifts, modified viking presses, and other push/pulls with the handles. Plus, this is turning into an eco system with the option for additional attachments into the hellbox. Now some improvements - angle up the weight arms like Fringe's dual horns; use a more refined locking pin for adjustments on the TNT handle; and put some endcaps on the weight horns (cheap plastic amazon ones work but you could really brand those suckers).

These are well made. but they're too small. I found it more comfortable to hold the end of my empty cable then to use these for flys, curls, and press downs. Porter PhysEd's Eclipse Grips are a much better solution to these in my experience. If they just had more surface area for your hand before the rotational piece, they would be much better. Maybe the 'danglers' are better that way?

These are ideal garage dumbbells. They're not freezing in the winter. They grip well when sweaty. I love a good knurl, but these just feel great. Also Rep's lifetime warranty is legit. I've used it twice once on the original shipment and once on some damage that occurred after a few years. I sent the story, a video and quickly had a shipment headed out to me.

Not sure anything could replace it. Maybe a different foam? It’s useful for so much. Sit-ups on the ground. Something to kneel on. Or tap your knee to for lunges. I also use it for my low back with my leg developer for lying leg extensions and prone leg curls.

Perfection at double the price. The rotation is smooth, the knurling is good, the curves are right and the length is sufficient for even lat pull downs without being unwieldy. I love curling and press downs with this.

These are definitely premium. The knurl, color, leather pad and customer service are top notch. There was a minor hiccup with my order and Matt P called / texted me to iron it out. These are also the best I’ve seen for simple movements - hammer curls, rear delt flys, single arm Push downs, lat raises. They work great.

Great slant board. Love that I don't have to adjust each foot and can just drop this light but sturdy platform on the ground and kick it in place. I use it a lot with my Mammoth for belt squats and calf raises

Love this. Made my 'free' fringe belt so comfy. Really helps you feel locked in and cozy while belt squatting.