Mammut

Sender Screwgate Carabiner

Solid carabiner

This is a solid working carabiner. I wouldn't use this to create anchor points or belay from it (although you absolutely could) I've just been using them for work loads at my gym I work at. It's small and works perfect for the tasks I use it for.

Very light weight and versatile locker. Super nice for anchors and it can be used with belay devices. The indicator is also nice for paranoid climbers, if you don't see any orange, the carabiner is locked!

Works well, operates smoothly and haven't had any issues yet

Lightweight D shape option

Lightweight and orange mark under the screw on the gate is amazing. Could be a larger option sometimes though

Lightweight, easy to manipulate

Very light, but still robust for the size. Easy to manipulate. Size is great for almost everything, but a little small for clove hitches or munter hitches with a rope thicker than 9.5

Great price

Overall cost and construction was just what I was looking for.

Great carabiner

10/10. Works great for cleaning routes. I use the bigger mammut biner for my gri gri but love this one for my atc.

Great locker

Small, lightweight, and has orange on the gate to indicate if it is open or locked. Plus the screw gate is smooth, really liking these lockers. Edit 12/23/23: On a wet day on the ice this month the gates on these froze and were prone to sticking. I was able to easily unlock them which was a bonus, but even after unlocking the gate itself required some work to get open. I did not have this issue on other carabiners that also have a color lock indicator.

LIGHT

These lockers are really light. I would recommend they find a way into your rack or standard gear. The red unlock marks you feel like a simpleton but they are idiot proof. Great for new climbers to focus on that detail and feel an additional layer of security even if they know nothing else.

Great locking biner

Works just like any locking biner should. I would give it 5 stars but with under 50 uses it has already started to become a little sticky. I don't know if I got a faulty one but overall it works great.