This is a lot of 5 steel lock collars, each with a set screw, and they’re zinc-plated to resist rust.

These are unbranded, but they’re solid metal – not flimsy.
The zinc plating gives them a bit of protection against moisture, so they’re good for indoor or light outdoor use.
They’re basically used to lock onto a shaft, rod, or pipe to keep things from sliding – think machinery, DIY projects, or even exercise equipment repairs.
Each collar has a set screw that you tighten with an Allen wrench to clamp it in place.

No specific dimensions given for inner diameter, so you’ll want to measure your shaft before buying.

They come as a lot of 5, so you’ve got extras or can use them on multiple projects.

The condition is open box – which means they’re basically new, no wear, but might not have the original retail packaging.
They do include original accessories though (the set screws), so you’re good to go.

Steel construction, zinc-plated finish, and they’re sold by an unbranded seller.
Great for hobbyists, mechanics, or anyone who needs to secure a rotating part.
No UPC or model number, just a simple hardware item.

If you know your shaft size and these fit, they’re a cheap way to get a bunch of reliable collars.
Just check the fit before tightening – and you’re set.